Patent Application
20250194411
The present application claims priority to and the benefit of Korean Patent Application No. 10-2023-0180101, filed on Dec. 12, 2023, in the Korean Intellectual Property Office, the entire content of which is incorporated herein by reference.
One or more embodiments of the present disclosure relate to a light-emitting device including a heterocyclic compound, an electronic apparatus and electronic equipment that include the light-emitting device and the heterocyclic compound.
Among light-emitting devices, self-emissive devices (e.g., organic light-emitting devices) have relatively wide viewing angles, high contrast ratios, short response times, and excellent or suitable characteristics in terms of luminance, driving voltage, and response speed.
In a light-emitting device, a first electrode is arranged on a substrate, and a hole transport region, an emission layer, an electron transport region, and a second electrode are sequentially arranged on the first electrode. Holes provided from the first electrode move toward the emission layer through the hole transport region, and electrons provided from the second electrode move toward the emission layer through the electron transport region. Carriers, such as the holes and electrons, combine in the emission layer to produce excitons. These excitons transition and decay from an excited state to a ground state, thereby generating light.
One or more aspects of embodiments of the present disclosure are directed toward a light-emitting device including a heterocyclic compound, an electronic apparatus and electronic equipment that include the light-emitting device, and the heterocyclic compound.
Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments of the disclosure.
According to one or more embodiments of the present disclosure, a light-emitting device includes:
According to one or more embodiments of the present disclosure, an electronic apparatus includes the light-emitting device.
According to one or more embodiments of the present disclosure, electronic equipment includes the light-emitting device.
According to one or more embodiments of the present disclosure, provided is the heterocyclic compound represented by Formula 1.
The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of the present disclosure. The drawings illustrate embodiments of the present disclosure and, together with the description, serve to explain principles of the present disclosure. The above and other aspects, features, and advantages of certain embodiments of the disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which:
Reference will now be made in more detail to one or more embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout the present disclosure, and duplicative descriptions thereof may not be provided for conciseness. In this regard, the embodiments of the present disclosure may have different forms and should not be construed as being limited to the descriptions set forth herein. Accordingly, the embodiments of the present disclosure are merely described in more detail, by referring to the drawings, to explain aspects of the present disclosure. As utilized herein, the term “and/or” or “or” may include any and all combinations of one or more of the associated listed items. Throughout the disclosure, the expressions such as “at least one of,” “one of,” and “selected from,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list. For example, “at least one of a, b, or c”, “at least one selected from a, b, and c”, “at least one selected from among a to c”, etc., may indicates only a, only b, only c, both (e.g., simultaneously) a and b, both (e.g., simultaneously) a and c, both (e.g., simultaneously) b and c, all of a, b, and c, or variations thereof. The “/” utilized herein may be interpreted as “and” or as “or” depending on the situation.
According to one or more embodiments of the present disclosure, a light-emitting device may include:
In one or more embodiments,
In one or more embodiments, the electron transport region of the light-emitting device may include a hole blocking layer, and the hole blocking layer may include a phosphine oxide-containing compound, a silicon-containing compound, or a (e.g., any suitable) combination thereof. For example, in one or more embodiments, the hole blocking layer may directly contact the emission layer.
In one or more embodiments, the heterocyclic compound may be included in the interlayer.
In one or more embodiments, the heterocyclic compound may be included in the emission layer.
In one or more embodiments, the emission layer may further include a transition metal-containing compound, a delayed fluorescence compound, or a (e.g., any suitable) combination thereof. In the emission layer, the heterocyclic compound, the transition metal-containing compound, and the delayed fluorescence compound may be different from each other.
In one or more embodiments, the emission layer may further include a second compound including at least one π electron-deficient nitrogen-containing C1-C60 heterocyclic group. In the emission layer, the second compound may be different from the heterocyclic compound.
In one or more embodiments, the emission layer may further include the transition metal-containing compound, the delayed fluorescence compound, and the second compound, in addition to the heterocyclic compound. In the emission layer, the heterocyclic compound, the transition metal-containing compound, the delayed fluorescence compound, and the second compound may be different from each other.
In one or more embodiments, the emission layer may further include a luminescent material.
In one or more embodiments, the luminescent material may include a transition metal-containing compound, a delayed fluorescence compound, or a (e.g., any suitable) combination thereof. In the luminescent material, the heterocyclic compound, the transition metal-containing compound, and the delayed fluorescence compound may be different from each other.
In one or more embodiments, the luminescent material may further include a second compound including at least one π electron-deficient nitrogen-containing C1-C60 heterocyclic group. In the luminescent material, the second compound may be different from the heterocyclic compound.
In one or more embodiments, the luminescent material may further include the transition metal-containing compound, the delayed fluorescence compound, and the second compound, in addition to the heterocyclic compound. In the luminescent material, the heterocyclic compound, the transition metal-containing compound, the delayed fluorescence compound, and the second compound may be different from each other.
In one or more embodiments, the transition metal-containing compound may include platinum (Pt).
In one or more embodiments, the transition metal-containing compound may include platinum (Pt) and a tetradentate ligand bonded to the platinum, and the platinum and one of carbon atoms of the tetradentate ligand may be bonded to each other via a coordinate bond.
In one or more embodiments, the transition metal-containing compound may be a carbene-containing compound.
In one or more embodiments, the transition metal-containing compound may be a compound represented by Formula 3:
In one or more embodiments, the delayed fluorescence compound may be a compound including at least one cyclic group including both (e.g., simultaneously) boron (B) and nitrogen (N) as ring-forming atoms. The delayed fluorescence compound may serve to improve the color purity, luminescence efficiency, and lifespan characteristics of the light-emitting device.
In one or more embodiments, the delayed fluorescence compound may be a compound in which a difference between a triplet energy level (eV) of the delayed fluorescence compound and a singlet energy level (eV) of the delayed fluorescence compound may be at least about 0 eV but not more than about 0.5 eV (or at least about 0 eV but not more than about 0.3 eV).
In one or more embodiments, the delayed fluorescence compound may be a C8-C60 polycyclic group-containing compound including two or more cyclic groups condensed to each other while sharing boron (B) (e.g., one being a first ring and the other being a second ring).
In one or more embodiments, the delayed fluorescence compound may include a condensed ring in which at least one third ring is condensed with at least one fourth ring, for example, to form the condensed ring including four or more rings,
the third ring of the delayed fluorescence compound may be a cyclopentane group, a cyclohexane group, a cycloheptane group, a cyclooctane group, a cyclopentene group, a cyclohexene group, a cycloheptene group, a cyclooctene group, an adamantane group, a norbornene group, a norbornane group, a bicyclo[1.1.1]pentane group, a bicyclo[2.1.1]hexane group, a bicyclo[2.2.2]octane group, a benzene group, a pyridine group, a pyrimidine group, a pyridazine group, a pyrazine group, or a triazine group, and
the fourth ring of the delayed fluorescence compound may be a 1,2-azaborinine group, a 1,3-azaborinine group, a 1,4-azaborinine group, a 1,2-dihydro-1,2-azaborinine group, a 1,4-oxaborinine group, a 1,4-thiaborinine group, or a 1,4-dihydroborinine group.
In one or more embodiments, the delayed fluorescence compound may include a compound represented by Formula 502, a compound represented by Formula 503, or a (e.g., any suitable) combination thereof:
In one or more embodiments, the second compound may include a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, or a (e.g., any suitable) combination thereof.
In one or more embodiments, the second compound may include a compound represented by Formula 2:
Details on the heterocyclic compound, the transition metal-containing compound, the delayed fluorescence compound, and the second compound may each independently be the same as described herein.
In one or more embodiments, the heterocyclic compound, the transition metal-containing compound, the delayed fluorescence compound, and the second compound, or a (e.g., any suitable) combination thereof, may include at least one deuterium.
In one or more embodiments, the heterocyclic compound may include at least one deuterium.
In one or more embodiments, the transition metal-containing compound, the delayed fluorescence compound, and the second compound, or a (e.g., any suitable) combination thereof, may include at least one deuterium.
In one or more embodiments, the heterocyclic compound may include at least one silicon.
In one or more embodiments, the second compound may include at least one silicon.
In one or more embodiments, the light-emitting device (e.g., the emission layer in the light-emitting device) may further include the transition metal-containing compound, in addition to the heterocyclic compound. At least one of the heterocyclic compound or the transition metal-containing compound may include at least one deuterium.
In one or more embodiments, the light-emitting device (e.g., the emission layer in the light-emitting device) may further include the delayed fluorescence compound, in addition to the heterocyclic compound, and at least one of the heterocyclic compound or the delayed fluorescence compound may include at least one deuterium.
In one or more embodiments, the light-emitting device (e.g., the emission layer in the light-emitting device) may further include the transition metal-containing compound and the delayed fluorescence compound, in addition to the heterocyclic compound, and at least one of the heterocyclic compound, the transition metal-containing compound, or the delayed fluorescence compound may include at least one deuterium.
In one or more embodiments, the light-emitting device (e.g., the emission layer in the light-emitting device) may further include the second compound, in addition to the heterocyclic compound, and at least one of the heterocyclic compound or the second compound may include at least one deuterium.
In one or more embodiments, the light-emitting device (e.g., the emission layer in the light-emitting device) may further include the transition metal-containing compound, the delayed fluorescence compound, and the second compound, in addition to the heterocyclic compound, and at least one of the heterocyclic compound, the transition metal-containing compound, the delayed fluorescence compound, or the second compound may include at least one deuterium.
In one or more embodiments, the heterocyclic compound and the second compound may form (or provide) an exciplex. The heterocyclic compound and the second compound may each include at least one deuterium.
In one or more embodiments, the emission layer of the light-emitting device may include: i) the heterocyclic compound and the second compound; and ii) the transition metal-containing compound or the delayed fluorescence compound.
In one or more embodiments, the emission layer may include a host and a dopant, and the heterocyclic compound may be included in the host. For example, in some embodiments, the heterocyclic compound may act as a host.
In one or more embodiments, the emission layer may be to emit blue light. The blue light may have a maximum emission wavelength in a range of, for example, about 430 nanometer (nm) to about 480 nm.
In one or more embodiments, the light emitted from the emission layer may have a maximum emission wavelength in a range of about 400 nm to about 500 nm, about 410 nm to about 490 nm, about 420 nm to about 480 nm, about 430 nm to about 475 nm, about 440 nm to about 475 nm, about 450 nm to about 475 nm, about 430 nm to about 470 nm, about 440 nm to about 470 nm, about 450 nm to about 470 nm, about 430 nm to about 465 nm, about 440 nm to about 465 nm, about 450 nm to about 465 nm, about 430 nm to about 460 nm, about 440 nm to about 460 nm, or about 450 nm to about 460 nm.
In one or more embodiments, the light-emitting device may satisfy at least one selected from among Conditions 1 to 4:
In the present disclosure, each of the HOMO energy level and the LUMO energy level of each of the heterocyclic compound, the second compound, and the transition metal-containing compound may be a negative value, and may be measured according to a suitable method.
In one or more embodiments, an absolute value of a difference between the LUMO energy level of the transition metal-containing compound and the LUMO energy level of the second compound may be at least about 0.1 eV but at most, e.g., not more than, about 1.0 eV, or an absolute value of a difference between the LUMO energy level of the transition metal-containing compound and the LUMO energy level of the heterocyclic compound may be at least about 0.1 eV but at most, e.g., not more than, about 1.0 eV, and an absolute value of a difference between the HOMO energy level of the transition metal-containing compound and the HOMO energy level of the second compound may be about 1.25 eV or less (e.g., at least about 0.2 eV but at most, e.g., not more than, about 1.25 eV), or an absolute value of a difference between the HOMO energy level of the transition metal-containing compound and the HOMO energy level of the heterocyclic compound may be about 1.25 eV or less (e.g., at least about 0.2 eV but at most, e.g., not more than, about 1.25 eV).
When the relationships between LUMO energy level and HOMO energy level satisfy the conditions as described above, a balance between holes and electrons injected into the emission layer may be achieved.
The light-emitting device may have a structure of a first embodiment or a second embodiment.
According to the first embodiment, the heterocyclic compound may be included in the emission layer in the interlayer of the light-emitting device, wherein the emission layer may further include a transition metal-containing compound, and the emission layer may be to emit phosphorescence or fluorescence emitted from the transition metal-containing compound. For example, according to the first embodiment, the heterocyclic compound may be a host, and the transition metal-containing compound may be a dopant or an emitter. For example, in some embodiments, the transition metal-containing compound may be a phosphorescent dopant or a phosphorescence emitter.
The phosphorescence or fluorescence emitted from the transition metal-containing compound may be blue light.
In one or more embodiments, the emission layer may further include an auxiliary dopant. The auxiliary dopant may serve to improve luminescence efficiency of the transition metal-containing compound by effectively transferring energy to the transition metal-containing compound, which is a dopant or an emitter.
The auxiliary dopant may be different from each of the transition metal-containing compound and the heterocyclic compound.
In one or more embodiments, the auxiliary dopant may be a delayed fluorescence-emitting compound.
In one or more embodiments, the auxiliary dopant may be a compound including at least one cyclic group including both (e.g., simultaneously) boron (B) and nitrogen (N) as ring-forming atoms.
In one or more embodiments, the emission layer may further include at least one host that is different from the heterocyclic compound, the transition metal-containing compound, and the auxiliary dopant. For example, in some embodiments, the emission layer may further include a second compound as a host.
According to the second embodiment, the heterocyclic compound may be included in the emission layer in the interlayer of the light-emitting device, wherein the emission layer may further include a transition metal-containing compound and a dopant, the heterocyclic compound, the transition metal-containing compound, and the dopant may be different from each other, and the emission layer may be to emit phosphorescence or fluorescence (e.g., delayed fluorescence) emitted from the dopant. For example, in one or more embodiments, according to the second embodiment, the heterocyclic compound may be a host, and the transition metal-containing compound may serve not as a dopant, but as an auxiliary dopant that transfers energy to a dopant (or emitter).
In one or more embodiments, in the second embodiment, the heterocyclic compound may be a host, and the transition metal-containing compound may serve as an emitter and also as an auxiliary dopant that transfers energy to a dopant (or emitter).
In one or more embodiments, the phosphorescence or fluorescence emitted from the dopant (or emitter) in the second embodiment may be blue phosphorescence or blue fluorescence (e.g., blue delayed fluorescence).
The dopant (or emitter) in the second embodiment may be a phosphorescent dopant material (e.g., the transition metal-containing compound) or any fluorescent dopant material (e.g., a compound represented by Formula 501, a compound represented by Formula 502, a compound represented by Formula 503, or a (e.g., any suitable) combination thereof).
In one or more embodiments, the emission layer may further include at least one host that is different from the heterocyclic compound, the transition metal-containing compound, and the dopant (or emitter). For example, in some embodiments, the emission layer may further include a second compound as a host.
The blue light in the first embodiment and the second embodiment may be blue light having a maximum emission wavelength in a range of about 400 nm to about 500 nm, about 410 nm to about 490 nm, about 420 nm to about 480 nm, about 430 nm to about 475 nm, about 440 nm to about 475 nm, about 450 nm to about 475 nm, about 430 nm to about 470 nm, about 440 nm to about 470 nm, about 450 nm to about 470 nm, about 430 nm to about 465 nm, about 440 nm to about 465 nm, about 450 nm to about 465 nm, about 430 nm to about 460 nm, about 440 nm to about 460 nm, or about 450 nm to about 460 nm.
The auxiliary dopant in the first embodiment may include, for example, the delayed fluorescence compound represented by Formula 502 or 503.
The host in the first embodiment and the second embodiment may further include a (e.g., any suitable) host material (e.g., a compound represented by Formula 301, a compound represented by 301-1, a compound represented by Formula 301-2, or a (e.g., any suitable) combination thereof).
In one or more embodiments, the light-emitting device may further include a capping layer outside (e.g., on) the first electrode and/or a capping layer outside (e.g., on) the second electrode.
In one or more embodiments, the light-emitting device may further include at least one of a first capping layer arranged outside (e.g., on) the first electrode or a second capping layer arranged outside (e.g., on) the second electrode, and the heterocyclic compound represented by Formula 1 may be included in at least one of the first capping layer or the second capping layer. More details on the first capping layer and/or the second capping layer may each independently be the same as described herein.
In one or more embodiments, the light-emitting device may include:
The expression “(an interlayer and/or a capping layer) includes a heterocyclic compound represented by Formula 1” as utilized herein may include an embodiment in which “(an interlayer and/or a capping layer) includes substantially identical heterocyclic compounds represented by Formula 1” and an embodiment in which “(an interlayer and/or a capping layer) includes two or more different heterocyclic compounds each represented by Formula 1.”
In one or more embodiments, the interlayer and/or the capping layer may include, as the heterocyclic compound, Compound 1 only. In this regard, Compound 1 may be present in the emission layer of the light-emitting device. In one or more embodiments, the interlayer may include, as the heterocyclic compound, Compound 1 and Compound 2. In this regard, Compound 1 and Compound 2 may be present in substantially the same layer (e.g., both (e.g., simultaneously) Compound 1 and Compound 2 may be present in the emission layer), or may be present in different layers (e.g., Compound 1 may be present in the emission layer, and Compound 2 may be present in the electron transport region).
The term “interlayer” as utilized herein refers to a single layer and/or all of multiple layers between the first electrode and the second electrode of the light-emitting device.
According to one or more embodiments of the present disclosure, an electronic apparatus may include the light-emitting device. In one or more embodiments, the electronic apparatus may further include a thin-film transistor. For example, in some embodiments, the electronic apparatus may further include a thin-film transistor including a source electrode and a drain electrode, wherein the first electrode of the light-emitting device may be electrically connected to the source electrode or the drain electrode. In some embodiments, the electronic apparatus may further include a color filter, a color conversion layer, a touch screen layer, a polarizing layer, or a (e.g., any suitable) combination thereof. More details on the electronic apparatus may be the same as described herein.
According to one or more embodiments of the present disclosure, an electronic equipment may include the light-emitting device.
For example, the electronic equipment may be at least one of a flat panel display, a curved display, a computer monitor, a medical monitor, a television, a billboard, an indoor or outdoor light and/or light for signal, a head-up display, a fully or partially transparent display, a flexible display, a rollable display, a foldable display, a stretchable display, a laser printer, a telephone, a mobile phone, a tablet, a phablet, a personal digital assistant (PDA), a wearable device, a laptop computer, a digital camera, a camcorder, a viewfinder, a micro display, a three-dimensional (3D) display, a virtual reality or augmented reality display, a vehicle, a video wall with multiple displays tiled together, a theater or stadium screen, a phototherapy device, or a signboard.
According to one or more embodiments of the present disclosure, the heterocyclic compound represented by Formula 1 is provided. Details on Formula 1 are the same as described herein.
Synthesis methods of the heterocyclic compound may be recognizable by one of ordinary skill in the art by referring to Synthesis Examples and/or Examples provided herein.
In Formula 1, R1 to R4 may each independently be a group represented by Formula 1A, a group represented by Formula 1B, hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C1-C60 alkyl group unsubstituted or substituted with at least one R10a, a C2-C60 alkenyl group unsubstituted or substituted with at least one R10a, a C2-C60 alkynyl group unsubstituted or substituted with at least one R10a, a C1-C60 alkoxy group unsubstituted or substituted with at least one R10a, a C1-C60 alkylthio group unsubstituted or substituted with at least one R10a, a C3-C60 carbocyclic group unsubstituted or substituted with at least one R10a, a C1-C60 heterocyclic group unsubstituted or substituted with at least one R10a, a C6-C60 aryloxy group unsubstituted or substituted with at least one R10a, a C6-C60 arylthio group unsubstituted or substituted with at least one R10a, a C7-C60 arylalkyl group unsubstituted or substituted with at least one R10a, —C(Q1)(Q2)(Q3), —Si(Q1)(Q2)(Q3), —N(Q1)(Q2), —B(Q1)(Q2), —C(═O)(Q1), —S(═O)2(Q1), or —P(═O)(Q1)(Q2).
In Formula 1, a1 indicates the number of R1(s) and may be an integer from 1 to 5, a2 indicates the number of R2(s) and may be an integer from 1 to 3, and a3 and a4 respectively indicate the number of R3(s) and the number of R4(s) and may each independently be an integer from 1 to 8. When a1 is 2 or more, two or more of R1 may be identical to or different from each other, if (e.g., when) a2 is 2 or more, two or more of R2(s) may be identical to or different from each other, if (e.g., when) a3 is 2 or more, two or more of R3(s) may be identical to or different from each other, and if (e.g., when) a4 is 2 or more, two or more of R4(s) may be identical to or different from each other.
In one or more embodiments, the number of groups represented by Formula 1A in the heterocyclic compound represented by Formula 1 may be 3 or more. The number of groups represented by Formula 1A in the heterocyclic compound represented by Formula 1 is calculated by including two groups represented by Formula 1A which are included in Formula 1. For example, if (e.g., when) one (e.g., exactly one) selected from among R1 to R4 is a group represented by Formula 1A, the number of groups represented by Formula 1A in the heterocyclic compound represented by Formula 1 is 3.
In one or more embodiments, the number of groups represented by Formula 1A in the heterocyclic compound represented by Formula 1 may be from 3 to 10.
In one or more embodiments, the number of groups represented by Formula 1A in the heterocyclic compound represented by Formula 1 may be from 3 to 5.
In one or more embodiments, the number of groups represented by Formula 1A in the heterocyclic compound represented by Formula 1 may be 3 or 4.
In one or more embodiments, at least one of R3 or R4 may be a group represented by Formula 1A.
In one or more embodiments, one or two selected from among R3 and R4 may be a group represented by Formula 1A.
In one or more embodiments, R1 to R4 may each independently be:
In one or more embodiments, R1 to R4 may each independently be a group represented by Formula 1A, a group represented by Formula 1B, hydrogen, deuterium, —F, a cyano group, a nitro group, —CH3, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, a group represented by one (e.g., any one) selected from among Formulae 9-1 to 9-19, a group represented by one selected from among Formulae 10-1 to 10-246, —C(Q1)(Q2)(Q3), —Si(Q1)(Q2)(Q3), or —P(═O)(Q1)(Q2):
In one or more embodiments, R1 to R4 may each independently be:
In Formula 1A, R5 may be a group represented by Formula 1A, a group represented by Formula 1B, hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C1-C60 alkyl group unsubstituted or substituted with at least one R10a, a C2-C60 alkenyl group unsubstituted or substituted with at least one R10a, a C2-C60 alkynyl group unsubstituted or substituted with at least one R10a, a C1-C60 alkoxy group unsubstituted or substituted with at least one R10a, a C1-C60 alkylthio group unsubstituted or substituted with at least one R10a, a C3-C60 carbocyclic group unsubstituted or substituted with at least one R10a, a C1-C60 heterocyclic group unsubstituted or substituted with at least one R10a, a C6-C60 aryloxy group unsubstituted or substituted with at least one R10a, a C6-C60 arylthio group unsubstituted or substituted with at least one R10a, a C7-C60 arylalkyl group unsubstituted or substituted with at least one R10a, —C(Q1)(Q2)(Q3), —Si(Q1)(Q2)(Q3), —N(Q1)(Q2), —B(Q1)(Q2), —C(═O)(Q1), —S(═O)2(Q1), or —P(═O)(Q1)(Q2).
In Formula 1A, a5 indicates the number of R5(s), and may be an integer from 1 to 8. When a5 is 2 or more, two or more of R5(s) may be identical to or different from each other.
In Formula 1A, * indicates a binding site to a neighboring atom.
In one or more embodiments, R5 may be:
In one or more embodiments, R5 may be a group represented by Formula 1A, a group represented by Formula 1B, hydrogen, deuterium, —F, a cyano group, a nitro group, —CH3, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, a group represented by one of (e.g., any one selected from among) Formulae 9-1 to 9-19, a group represented by one of (e.g., any one selected from among) of Formulae 10-1 to 10-246, —C(Q1)(Q2)(Q3), —Si(Q1)(Q2)(Q3), or —P(═O)(Q1)(Q2):
In one or more embodiments, R5 may be:
In one or more embodiments, at least one R5 may be a group represented by Formula 1A.
In Formula 1B, L1 may be a single bond, a C3-C60 carbocyclic group unsubstituted or substituted with at least one R10a, or a C1-C60 heterocyclic group unsubstituted or substituted with at least one R10a.
In one or more embodiments, L1 may be a single bond, a C6-C60 arylene group unsubstituted or substituted with at least one R10a, a C2-C60 heteroarylene group unsubstituted or substituted with at least one R10a, a divalent non-aromatic condensed polycyclic group unsubstituted or substituted with at least one R10a, or a divalent non-aromatic condensed heteropolycyclic group unsubstituted or substituted with at least one R10a.
In one or more embodiments, L1 may be a single bond, a benzene group, a naphthalene group, an anthracene group, a phenanthrene group, a triphenylene group, a pyrene group, a chrysene group, a cyclopentadiene group, a 1,2,3,4-tetrahydronaphthalene group, a thiophene group, a selenophene group, a furan group, an indole group, a benzoborole group, a benzophosphole group, an indene group, a benzosilole group, a benzogermole group, a benzothiophene group, a benzoselenophene group, a benzofuran group, a carbazole group, a dibenzoborole group, a dibenzophosphole group, a fluorene group, a dibenzosilole group, a dibenzogermole group, a dibenzothiophene group, a dibenzoselenophene group, a dibenzofuran group, a dibenzothiophene-5-oxide group, a 9H-fluorene-9-one group, a dibenzothiophene-5,5-dioxide group, an azaindole group, an azabenzoborole group, an azabenzophosphole group, an azaindene group, an azabenzosilole group, an azabenzogermole group, an azabenzothiophene group, an azabenzoselenophene group, an azabenzofuran group, an azacarbazole group, an azadibenzoborole group, an azadibenzophosphole group, an azafluorene group, an azadibenzosilole group, an azadibenzogermole group, an azadibenzothiophene group, an azadibenzoselenophene group, an azadibenzofuran group, an azadibenzothiophene-5-oxide group, an aza-9H-fluorene-9-one group, an azadibenzothiophene-5,5-dioxide group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a quinoline group, an isoquinoline group, a quinoxaline group, a quinazoline group, a phenanthroline group, a pyrrole group, a pyrazole group, an imidazole group, a triazole group, an oxazole group, an isoxazole group, a thiazole group, an isothiazole group, an oxadiazole group, a thiadiazole group, a benzopyrazole group, a benzimidazole group, a benzoxazole group, a benzothiazole group, a benzoxadiazole group, a benzothiadiazole group, a 5,6,7,8-tetrahydroisoquinoline group, or a 5,6,7,8-tetrahydroquinoline group, each unsubstituted or substituted with at least one R10a.
In one or more embodiments, L1 may be a single bond, a benzene group, or a carbazole group,
In Formula 1B, b1 may be an integer selected from 0 to 3.
In one or more embodiments, b1 may be 0 or 1.
In Formula 1B, Ar1 to Ar3 may each independently be a C3-C60 carbocyclic group unsubstituted or substituted with at least one R10a or a C1-C60 heterocyclic group unsubstituted or substituted with at least one R10a.
In Formula 1B, * indicates a binding site to a neighboring atom.
In one or more embodiments, Ar1 to Ar3 may each independently be a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a phenyl group, a biphenyl group, a naphthyl group, a fluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, a benzoisothiazolyl group, a benzoxazolyl group, a benzoisoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, an azafluorenyl group, or an azadibenzosilolyl group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, a hydroxyl group, a cyano group, a nitro group, a C1-C20 alkyl group, a C1-C20 alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a phenyl group, a biphenyl group, a (C1-C10 alkyl)phenyl group, a naphthyl group, a fluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, a benzothiazolyl group, a benzoisoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzosilolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, —O(Q31), —S(Q31), —Si(Q31)(Q32)(Q33), —N(Q31)(Q32), —B(Q31)(Q32), —P(Q31)(Q32), —C(═O)(Q31), —S(═O)2(Q31), —P(═O)(Q31)(Q32), or a (e.g., any suitable) combination thereof, and
Q31 to Q33 may each independently be: hydrogen; deuterium; —F; —Cl; —Br; —I; a hydroxyl group; a cyano group; a nitro group; a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C60 carbocyclic group, or a C1-C60 heterocyclic group, each unsubstituted or substituted with deuterium, —F, a cyano group, a C1-C60 alkyl group, a C1-C60 alkoxy group, a phenyl group, a biphenyl group, a pyridinyl group, a pyrimidinyl group, a pyridazinyl group, a pyrazinyl group, a triazinyl group, or a (e.g., any suitable) combination thereof.
In one or more embodiments, Ar1 to Ar3 may each independently be a group represented by one of (e.g., any one selected from among) of Formulae 10-1 to 10-4, 10-9, 10-10, 10-13 to 10-154, and 10-156 to 10-246:
In one or more embodiments, at least one selected from among R1 to R5 may be a group represented by Formula 1B.
In one or more embodiments, the heterocyclic compound represented by Formula 1 may be substituted with at least one deuterium.
In one or more embodiments, a substitution ratio of deuterium of the heterocyclic compound represented by Formula 1 may be in a range of about 10% to about 100%. The term “substitution ratio of deuterium” as utilized herein refers to the number of deuterium atoms included in the heterocyclic compound represented by Formula 1 compared to the number of hydrogen and deuterium atoms included in the heterocyclic compound represented by Formula 1, which is expressed as a percentage.
In one or more embodiments, the substitution ratio of deuterium of the heterocyclic compound represented by Formula 1 may be in a range of about 50% to about 100%.
In one or more embodiments, the heterocyclic compound represented by Formula 1 may be a compound represented by one selected from among Formulae 1(1) to 1(9):
Unless defined otherwise, for example, in the description of Formula 1, R10a may be:
Unless defined otherwise, for example, in the description of Formula 1, Q1 to Q3, Q11 to Q13, Q21 to Q23, and Q31 to Q33 may each independently be: hydrogen; deuterium; —F; —Cl; —Br; —I; a hydroxyl group; a cyano group; a nitro group; a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C60 carbocyclic group, or a C1-C60 heterocyclic group, each unsubstituted or substituted with deuterium, —F, a cyano group, a C1-C60 alkyl group, a C1-C60 alkoxy group, a phenyl group, a biphenyl group, a pyridinyl group, a pyrimidinyl group, a pyridazinyl group, a pyrazinyl group, a triazinyl group, or a (e.g., any suitable) combination thereof.
Due to the inclusion of three or more groups represented by Formula 1A in the molecule, the heterocyclic compound represented by Formula 1 may have enhanced electron donating ability, so that the HOMO energy level of the heterocyclic compound becomes shallow, resulting in improved hole transporting ability. Thus, if (e.g., when) the heterocyclic compound is applied to a light-emitting device, a decrease in driving voltage may be obtained. In one or more embodiments, due to the inclusion of a group represented by Formula 1B in the molecule, the heterocyclic compound may have a structure with relatively high steric hindrance, so that conjugation is suppressed or reduced, resulting in high triplet energy. Thus, the heterocyclic compound may exhibit relatively high efficiency characteristics, and may have relatively high thermal stability. Therefore, due to the utilization of the heterocyclic compound, an electronic device (e.g., an organic light-emitting device) having relatively low driving voltage and relatively high efficiency characteristics may be implemented.
In Formula 2, b51 to b53 indicate the number of L51(s) to the number of L53(s), respectively, and may each independently be an integer from 1 to 5. When b51 is 2 or more, two or more of L51(s) may be identical to or different from each other, if (e.g., when) b52 is 2 or more, two or more of L52(s) may be identical to or different from each other, and if (e.g., when) b53 is 2 or more, two or more of L53(s) may be identical to or different from each other. In one or more embodiments, b51 to b53 may each independently be 1 or 2.
In Formula 2, L51 to L53 may each independently be:
In one or more embodiments, in Formula 2, a bond between L51 and R51, a bond between L52 and R52, a bond between L53 and R53, a bond between two L51(s), a bond between two L52(s), a bond between two L53(s), a bond between L51 and carbon between X54 and X55 in Formula 2, a bond between L52 and carbon between X54 and X56 in Formula 2, and a bond between L53 and carbon between X55 and X56 in Formula 2 may each be a “carbon-carbon single bond.”
In Formula 2, X54 may be N or C(R54), X55 may be N or C(R55), X56 may be N or C(R56), and at least one selected from among X54 to X56 may be N. R54 to R56 may each independently be the same as described herein. For example, in one or more embodiments, two or three selected from among X54 to X56 may each be N.
In one or more embodiments, in Formula 2, a group represented by *-(L51)b51-R51 and a group represented by *-(L52)b52-R52 may not each be a phenyl group.
In one or more embodiments, in Formula 2, a group represented by *-(L51)b51-R51 and a group represented by *-(L52)b52-R52 may be identical to each other.
In one or more embodiments, in Formula 2, a group represented by *-(L51)b51-R51 and a group represented by *-(L52)b52-R52 may be different from each other.
In one or more embodiments, in Formula 2, b51 and b52 may each be 1, 2, or 3, and L51 and L52 may each independently be a benzene group, a pyridine group, a pyrimidine group, a pyridazine group, a pyrazine group, or a triazine group, each unsubstituted or substituted with at least one R10a.
In one or more embodiments, in Formula 2, R51 and R52 may each independently be a C3-C60 carbocyclic group unsubstituted or substituted with at least one R10a, a C1-C60 heterocyclic group unsubstituted or substituted with at least one R10a, a C6-C60 aryloxy group unsubstituted or substituted with at least one R10a, a C6-C60 arylthio group unsubstituted or substituted with at least one R10a, —C(Q1)(Q2)(Q3), or —Si(Q1)(Q2)(Q3), and
In one or more embodiments,
In one or more embodiments,
a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a phenyl group, a biphenyl group, a (C1-C10 alkyl)phenyl group, a naphthyl group, a fluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, a benzoisothiazolyl group, a benzoxazolyl group, a benzoisoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, an azafluorenyl group, or an azadibenzosilolyl group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, a hydroxyl group, a cyano group, a nitro group, a C1-C20 alkyl group, a C1-C20 alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a phenyl group, a biphenyl group, a (C1-C10 alkyl)phenyl group, a naphthyl group, a fluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, a benzoisothiazolyl group, a benzoxazolyl group, a benzoisoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, or a (e.g., any suitable) combination thereof; or
In one or more embodiments, in Formula 2, R51 to R56 may each independently be:
In Formula 3, M may be platinum (Pt), palladium (Pd), copper (Cu), silver (Ag), gold (Au), rhodium (Rh), ruthenium (Ru), osmium (Os), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb), or thulium (Tm).
In one or more embodiments, M may be Pt.
In Formula 3, X901 to X904 may each independently be C or N.
In one or more embodiments, X901 may be C. For example, in some embodiments, in Formula 3, X901 may be C, and C may be carbon of a carbene moiety.
In one or more embodiments, in Formula 3, X901 may be N.
In one or more embodiments, X902 and X903 may each be C, and X904 may be N.
In Formula 3, i) a bond between X901 and M may be a coordinate bond, ii) one selected from among a bond between X902 and M, a bond between X903 and M, and a bond between X904 and M may be a coordinate bond, and the other two may each be a covalent bond.
In one or more embodiments, a bond between X901 and M and a bond between X904 and M may each be a coordinate bond, and a bond between X902 and M and a bond between X903 and M may each be a covalent bond.
In one or more embodiments, X901 may be C, and a bond between X901 and M may be a coordinate bond.
In Formula 3, ring CY901 to ring CY904 may each independently be a C5-C30 carbocyclic group or a C1-C30 heterocyclic group.
In one or more embodiments, ring CY901 may be a nitrogen-containing C1-C60 heterocyclic group.
In Formula 3, ring CY901 may be i) an X901-containing 5-membered ring, ii) an X901-containing 5-membered ring in which at least one 6-membered ring is condensed, or iii) an X901-containing 6-membered ring. In one or more embodiments, in Formula 3, ring CY901 may be i) an X901-containing 5-membered ring or ii) an X901-containing 5-membered ring in which at least one 6-membered ring is condensed. For example, ring CY901 may include a 5-membered ring bonded to M in Formula 3 via X901. In this regard, the X901-containing 5-membered ring may be a pyrrole group, a pyrazole group, an imidazole group, a triazole group, an oxazole group, an isoxazole group, a thiazole group, an isothiazole group, an oxadiazole group, or a thiadiazole group, and the X901-containing 6-membered ring and the 6-membered ring which may be optionally condensed to the X901-containing 5-membered ring may each independently be a benzene group, a pyridine group, or a pyrimidine group.
In one or more embodiments, ring CY901 may be an X901-containing 5-membered ring, and the X901-containing 5-membered ring may be an imidazole group or a triazole group.
In one or more embodiments, ring CY901 may be an X901-containing 5-membered ring in which at least one 6-membered ring is condensed, and the X901-containing 5-membered ring in which the at least one 6-membered ring is condensed may be a benzimidazole group or an imidazopyridine group.
In one or more embodiments, ring CY901 may be an imidazole group, a triazole group, a benzimidazole group, or an imidazopyridine group.
In one or more embodiments, X901 may be C, and ring CY901 may be an imidazole group, a triazole group, a benzimidazole group, a naphthoimidazole group, or an imidazopyridine group.
In one or more embodiments, ring CY902 may be a benzene group, a pyridine group, a pyrimidine group, a naphthalene group, a dibenzofuran group, a dibenzothiophene group, a carbazole group, a fluorene group, a dibenzosilole group, a naphthobenzofuran group, a naphthobenzothiophene group, a benzocarbazole group, a benzofluorene group, a naphthobenzosilole group, a dinaphthofuran group, a dinaphthothiophene group, a dibenzocarbazole group, a dibenzofluorene group, a dinaphthosilole group, an azadibenzofuran group, an azadibenzothiophene group, an azacarbazole group, an azafluorene group, an azadibenzosilole group, an azanaphthobenzofuran group, an azanaphthobenzothiophene group, an azabenzocarbazole group, an azabenzofluorene group, an azanaphthobenzosilole group, an azadinaphthofuran group, an azadinaphthothiophene group, an azadibenzocarbazole group, an azadibenzofluorene group, or an azadinaphthosilole group.
In one or more embodiments, ring CY902 may be a benzene group, a pyridine group, a pyrimidine group, a naphthalene group, a dibenzofuran group, a dibenzothiophene group, a carbazole group, a fluorene group, or a dibenzosilole group.
In Formula 3, ring CY903 may be: a C2-C8 monocyclic group; or a C4-C20 polycyclic group in which two or three C2-C8 monocyclic groups are condensed with each other.
In one or more embodiments, in Formula 3, ring CY903 may be: a C4-C6 monocyclic group; or a C4-C8 polycyclic group in which two or three C4-C6 monocyclic groups are condensed with each other.
The term “C2-C8 monocyclic group” as utilized herein refers to a non-condensed cyclic group. For example, the C2-C8 monocyclic group may be a cyclopentadiene group, a pyrrole group, a pyrazole group, an imidazole group, a triazole group, an oxazole group, an isoxazole group, a thiazole group, an isothiazole group, an oxadiazole group, a thiadiazole group, a benzene group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a cycloheptadiene group, or a cyclooctadiene group.
In one or more embodiments, ring CY903 may be a benzene group, a pyridine group, a pyrimidine group, a naphthalene group, a dibenzofuran group, a dibenzothiophene group, a carbazole group, a fluorene group, a dibenzosilole group, an azadibenzofuran group, an azadibenzothiophene group, an azacarbazole group, an azafluorene group, or an azadibenzosilole group.
In Formula 3, ring CY904 may be a nitrogen-containing C1-C60 heterocyclic group.
In one or more embodiments, ring CY904 may be a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a quinoline group, an isoquinoline group, a quinoxaline group, a quinazoline group, a phenanthroline group, a pyrrole group, a pyrazole group, an imidazole group, a triazole group, a benzopyrazole group, a benzimidazole group, or a benzothiazole group.
In Formula 3, L901 to L903 may each independently be a single bond, *—C(R1a)(R1b)—*′, *—C(R1a)═*′, *═C(R1a)—*′, *—C(R1a)═C(R1b)—*′, *—C(═O)—*′, *—C(═S)—*′, *—C≡C—*′, *—B(R1a)—*′, *—N(R1a)—*′, *—O—*′, *—P(R1a)—*′, *—Si(R1a)(R1b)—*′, *—P(═O)(R1a)—*′, *—S—*′, *—S(═O)—*′, *—S(═O)2—*′, or *—Ge(R1a)(R1b)—*′, wherein * and *′ each indicate a binding site to a neighboring atom.
In one or more embodiments, L901 and L903 may each be a single bond, and L902 may be *—C(R1a)(R1b)—*′, *—B(R1a)—*′, *—N(R1a)—*′, *—O—*′, *—P(R1a)—*′, *—Si(R1a)(R1b)—*′, or *—S—*′.
In one or more embodiments, L902 may be *—O—*′ or *—S—*′.
In Formula 3, n901 to n903 indicate the number of L901(s) to the number of L903(s), respectively, and may each independently be an integer from 1 to 5. When each of n901 to n903 is 2 or more, each of: two or more of L901(s); two or more of L902(s); and two or more of L903(s) may be identical to or different from each other.
In one or more embodiments, n902 may be 1.
In Formula 3, R901 to R904, R1a, and R1b may each independently be hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C1-C60 alkyl group unsubstituted or substituted with at least one R10a, a C2-C60 alkenyl group unsubstituted or substituted with at least one R10a, a C2-C60 alkynyl group unsubstituted or substituted with at least one R10a, a C1-C60 alkoxy group unsubstituted or substituted with at least one R10a, a C3-C60 carbocyclic group unsubstituted or substituted with at least one R10a, a C1-C60 heterocyclic group unsubstituted or substituted with at least one R10a, a C6-C60 aryloxy group unsubstituted or substituted with at least one R10a, a C6-C60 arylthio group unsubstituted or substituted with at least one R10a, a C7-C60 arylalkyl group unsubstituted or substituted with at least one R10a, —C(Q1)(Q2)(Q3), —Si(Q1)(Q2)(Q3), —N(Q1)(Q2), —B(Q1)(Q2), —C(═O)(Q1), —S(═O)2(Q1), or —P(═O)(Q1)(Q2).
In one or more embodiments, R901 to R904, R1a, and R1b may each independently be:
In one or more embodiments, R901 to R904, R1a, and R1b may each independently be:
In Formula 3, a901 to a904 indicate the number of R901(s) to the number of R904(s), respectively, and may each independently be an integer from 1 to 10. When each of a901 to a904 is 2 or more, each of: two or more of R901(s); two or more of R902(s); two or more of R903(s); and two or more of R904(s) may be identical to or different from each other.
In Formulae 502 and 503,
In Formulae 502 and 503, a501 to a504 indicate the number of R501(s) to the number of R504(s), respectively, and may each independently be an integer from 0 to 20. When a501 is 2 or more, two or more of R501(s) may be identical to or different from each other, if (e.g., when) a502 is 2 or more, two or more of R502 (S) may be identical to or different from each other, if (e.g., when) a503 is 2 or more, two or more of R503(s) may be identical to or different from each other, and if (e.g., when) a504 is 2 or more, two or more of R504(s) may be identical to or different from each other. In some embodiments, a501 to a504 may each independently be an integer from 0 to 8.
R500a, R500b, R501 to R508, R505a, R505b, R506a, R506b, R507a, R507b, R508a, and R508b utilized herein may each independently be hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C1-C60 alkyl group unsubstituted or substituted with at least one R10a, a C2-C60 alkenyl group unsubstituted or substituted with at least one R10a, a C2-C60 alkynyl group unsubstituted or substituted with at least one R10a, a C1-C60 alkoxy group unsubstituted or substituted with at least one R10a, a C3-C60 carbocyclic group unsubstituted or substituted with at least one R10a, a C1-C60 heterocyclic group unsubstituted or substituted with at least one R10a, a C6-C60 aryloxy group unsubstituted or substituted with at least one R10a, a C6-C60 arylthio group unsubstituted or substituted with at least one R10a, a C7-C60 arylalkyl group unsubstituted or substituted with at least one R10a, a C2-C60 heteroarylalkyl group unsubstituted or substituted with at least one R10a, —C(Q1)(Q2)(Q3), —Si(Q1)(Q2)(Q3), —N(Q1)(Q2), —B(Q1)(Q2), —C(═O)(Q1), —S(═O)2(Q1), or —P(═O)(Q1)(Q2). Q1 to Q3 are each the same as described herein.
In one or more embodiments, in Formulae 502 and 503, R500a, R500b, R501 to R508, R505a, R505b, R506a, R506b, R507a, R507b, R508a, and R508b may each independently be:
In one or more embodiments, R10a utilized herein may be:
In one or more embodiments, i) R51 to R56 in Formula 2, ii) R500a, R500b, R501 to R508, R505a, R505b, R506a, R506b, R507a, R507b, R508a, and R508b in Formulae 502 and 503, and iii) R10a may each independently be hydrogen, deuterium, —F, a cyano group, a nitro group, —CH3, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, a group represented by one selected from among Formulae 9-1 to 9-19, a group represented by one selected from among Formulae 10-1 to 10-246, —C(Q1)(Q2)(Q3), —Si(Q1)(Q2)(Q3), or —P(═O)(Q1)(Q2) (wherein Q1 to Q3 are each the same as described herein):
In one or more embodiments, the heterocyclic compound represented by Formula 1 may be one selected from among Compounds 1 to 186:
Hereinafter, the structure of the light-emitting device 10 according to one or more embodiments and a method of manufacturing the light-emitting device 10 will be described with reference to
In
The first electrode 110 may be formed by, for example, depositing or sputtering a material for forming (or providing) the first electrode 110 on the substrate. When the first electrode 110 is an anode, a material for forming (or providing) the first electrode 110 may be a high-work function material that facilitates injection of holes.
The first electrode 110 may be a reflective electrode, a semi-transmissive electrode, or a transmissive electrode. In one or more embodiments, if (e.g., when) the first electrode 110 is a transmissive electrode, a material for forming (or providing) the first electrode 110 may include indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO2), zinc oxide (ZnO), or a (e.g., any suitable) combination thereof. In one or more embodiments, if (e.g., when) the first electrode 110 is a semi-transmissive electrode or a reflective electrode, a material for forming (or providing) the first electrode 110 may include magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), magnesium-silver (Mg—Ag), or a (e.g., any suitable) combination thereof.
The first electrode 110 may have a single-layer structure including (e.g., consisting of) a single layer or a multi-layer structure including multiple layers. For example, in some embodiments, the first electrode 110 may have a three-layer structure of ITO/Ag/ITO.
The interlayer 130 may be arranged on the first electrode 110. The interlayer 130 may include an emission layer.
In one or more embodiments, the interlayer 130 may further include a hole transport region between the first electrode 110 and the emission layer, and an electron transport region between the emission layer and the second electrode 150.
In one or more embodiments, the interlayer 130 may further include, in addition to one or more suitable organic materials, a metal-containing compound such as an organometallic compound, an inorganic material such as a quantum dot, and/or the like.
In one or more embodiments, the interlayer 130 may include i) two or more emitting units sequentially stacked between the first electrode 110 and the second electrode 150, and ii) a charge generation layer between the two or more emitting units. When the interlayer 130 includes the two or more emitting units and the charge generation layer, the light-emitting device 10 may be a tandem light-emitting device.
The hole transport region may have i) a single-layer structure including (e.g., consisting of) a single layer including (e.g., consisting of) a single material, ii) a single-layer structure including (e.g., consisting of) a single layer including multiple materials that are different from each other, or iii) a multi-layer structure including multiple layers including multiple materials that are different from each other.
The hole transport region may include a hole injection layer, a hole transport layer, an emission auxiliary layer, an electron blocking layer, or a (e.g., any suitable) combination thereof.
In one or more embodiments, the hole transport region may have a multi-layer structure including a hole injection layer/hole transport layer structure, a hole injection layer/hole transport layer/emission auxiliary layer structure, a hole injection layer/emission auxiliary layer structure, a hole transport layer/emission auxiliary layer structure, or a hole injection layer/hole transport layer/electron blocking layer structure, wherein constituent layers of each structure are stacked sequentially from the first electrode 110 in the stated order.
In one or more embodiments, the hole transport region may include a compound represented by Formula 201, a compound represented by Formula 202, or a (e.g., any suitable) combination thereof:
In one or more embodiments, each of Formulae 201 and 202 may include at least one selected from among groups represented by Formulae CY201 to CY217:
wherein, in Formulae CY201 to CY217, R10b and R10c are each the same as described with respect to R10a, ring CY201 to ring CY204 may each independently be a C3-C20 carbocyclic group or a C1-C20 heterocyclic group, and at least one hydrogen in Formulae CY201 to CY217 may be unsubstituted or substituted with R10a.
In one or more embodiments, in Formulae CY201 to CY217, ring CY201 to ring CY204 may each independently be a benzene group, a naphthalene group, a phenanthrene group, or an anthracene group.
In one or more embodiments, each of Formulae 201 and 202 may include at least one selected from among the groups represented by Formulae CY201 to CY203.
In one or more embodiments, Formula 201 may include at least one selected from among the groups represented by Formulae CY201 to CY203 and at least one selected from among the groups represented by Formulae CY204 to CY217.
In one or more embodiments, in Formula 201, xa1 may be 1, R201 may be one selected from among the groups represented by Formulae CY201 to CY203, xa2 may be 0, and R202 may be one selected from among the groups represented by Formulae CY204 to CY207.
In one or more embodiments, each of Formulae 201 and 202 may not include (e.g., may exclude) any of the groups represented by Formulae CY201 to CY203.
In one or more embodiments, each of Formulae 201 and 202 may not include (e.g., may exclude) any of the groups represented by Formulae CY201 to CY203, and may include at least one selected from among the groups represented by Formulae CY204 to CY217.
In one or more embodiments, each of Formulae 201 and 202 may not include (e.g., may exclude) any of the groups represented by Formulae CY201 to CY217.
In one or more embodiments, the hole transport region may include: at least one selected from among Compounds HT1 to HT46; 4,4′,4″-[tris(3-methylphenyl)phenylamino] triphenylamine (m-MTDATA); 4,4′,4″-tris(N,N-diphenylamino)triphenylamine (TDATA); 4,4′,4″-tris[N-(2-naphthyl)-N-phenylamino]-triphenylamine (2-TNATA); N,N′-di(naphthalen-1-yl)-N, N′-diphenyl-benzidine (NPB(NPD)); β-NPB; N,N′-bis(3-methylphenyl)-N, N′-diphenyl-[1,1′-biphenyl]-4,4′-diamine (TPD); spiro-TPD; spiro-NPB; methylated NPB; 4,4′-cyclohexylidene bis[N,N-bis(4-methylphenyl)benzenamine] (TAPC); 4,4′-bis[N,N′-(3-tolyl)amino]-3,3′-dimethylbiphenyl (HMTPD); 4,4′,4″-tris(N-carbazolyl)triphenylamine (TCTA); polyaniline/dodecylbenzenesulfonic acid (PANI/DBSA); poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS); polyaniline/camphor sulfonic acid (PANI/CSA); polyaniline/poly(4-styrenesulfonate) (PANI/PSS); or a (e.g., any suitable) combination thereof:
A thickness of the hole transport region may be in a range of about 50 angstrom (Å) to about 10,000 Å, for example, about 100 Å to about 4,000 Å. When the hole transport region includes a hole injection layer, a hole transport layer, or a (e.g., any suitable) combination thereof, a thickness of the hole injection layer may be in a range of about 100 Å to about 9,000 Å, for example, about 100 Å to about 1,000 Å, and a thickness of the hole transport layer may be in a range of about 50 Å to about 2,000 Å, for example, about 100 Å to about 1,500 Å. When the thicknesses of the hole transport region, the hole injection layer, and the hole transport layer are within the ranges described above, satisfactory hole transporting characteristics may be obtained without a substantial increase in driving voltage.
The emission auxiliary layer may increase light-emission efficiency by compensating for an optical resonance distance according to the wavelength of light emitted by the emission layer, and the electron blocking layer may block or reduce the leakage of electrons from the emission layer to the hole transport region. Materials that may be included in the hole transport region may be included in the emission auxiliary layer and the electron blocking layer.
p-Dopant
In one or more embodiments, the hole transport region may further include, in addition to one or more of the materials described above, a charge-generation material for the improvement of conductive properties. The charge-generation material may be uniformly (substantially uniformly) or non-uniformly dispersed in the hole transport region (e.g., in the form of a single layer including (e.g., consisting of) a charge-generation material).
The charge-generation material may be, for example, a p-dopant.
In one or more embodiments, the p-dopant may have a LUMO energy level of −3.5 eV or less.
In one or more embodiments, the p-dopant may include a quinone derivative, a cyano group-containing compound, a compound including element EL1 and element EL2, or a (e.g., any suitable) combination thereof.
Non-limiting examples of the quinone derivative may be tetracyanoquinodimethane (TCNQ), 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ), and/or the like.
Non-limiting examples of the cyano group-containing compound may be dipyrazino[2,3-f: 2′,3′-h] quinoxaline-2,3,6,7,10,11-hexacarbonitrile (HAT-CN), a compound represented by Formula 221, and/or the like:
In the compound including element EL1 and element EL2, element EL1 may be a metal, a metalloid, or a (e.g., any suitable) combination thereof, and element EL2 may be a non-metal, a metalloid, or a (e.g., any suitable) combination thereof.
Non-limiting examples of the metal may be: an alkali metal (e.g., lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and/or the like); an alkaline earth metal (e.g., beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and/or the like); a transition metal (e.g., titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), tungsten (W), manganese (Mn), technetium (Tc), rhenium (Re), iron (Fe), ruthenium (Ru), osmium (Os), cobalt (Co), rhodium (Rh), iridium (Ir), nickel (Ni), palladium (Pd), platinum (Pt), copper (Cu), silver (Ag), gold (Au), and/or the like); a post-transition metal (e.g., zinc (Zn), indium (In), tin (Sn), and/or the like); a lanthanide metal (e.g., lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), and/or the like); and/or the like.
Non-limiting examples of the metalloid may be silicon (Si), antimony (Sb), tellurium (Te), and/or the like.
Non-limiting examples of the non-metal may be oxygen (O), a halogen (e.g., F, Cl, Br, I, and/or the like), and/or the like.
Examples of the compound including element EL1 and element EL2 may be metal oxides, metal halides (e.g., metal fluorides, metal chlorides, metal bromides, metal iodides, and/or the like), metalloid halides (e.g., metalloid fluorides, metalloid chlorides, metalloid bromides, metalloid iodides, and/or the like), metal tellurides, or a (e.g., any suitable) combination thereof.
Non-limiting examples of the metal oxide may be tungsten oxides (e.g., WO, W2O3, WO2, WO3, W2O5, and/or the like), vanadium oxides (e.g., VO, V2O3, VO2, V2O5, and/or the like), molybdenum oxides (e.g., MoO, Mo2O3, MoO2, MoO3, Mo2O5, and/or the like), rhenium oxides (e.g., ReO3, and/or the like), and/or the like.
Non-limiting examples of the metal halide may be alkali metal halides, alkaline earth metal halides, transition metal halides, post-transition metal halides, lanthanide metal halides, and/or the like.
Non-limiting examples of the alkali metal halide may be LiF, NaF, KF, RbF, CsF, LiCl, NaCl, KCl, RbCl, CsCl, LiBr, NaBr, KBr, RbBr, CsBr, LiI, NaI, KI, RbI, CsI, and/or the like.
Non-limiting examples of the alkaline earth metal halide may be BeF2, MgF2, CaF2, SrF2, BaF2, BeCl2, MgCl2, CaCl2), SrCl2, BaCl2, BeBr2, MgBr2, CaBr2, SrBr2, BaBr2, BeI2, MgI2, CaI2, SrI2, BaI2, and/or the like.
Non-limiting examples of the transition metal halide may be titanium halides (e.g., TiF4, TiCl4, TiBr4, TiI4, and/or the like), zirconium halides (e.g., ZrF4, ZrCl4, ZrBr4, ZrI4, and/or the like), hafnium halides (e.g., HfF4, HfCl4, HfBr4, HfI4, and/or the like), vanadium halides (e.g., VF3, VCl3, VBr3, VI3, and/or the like), niobium halides (e.g., NbF3, NbCl3, NbBr3, NbI3, and/or the like), tantalum halides (e.g., TaF3, TaCl3, TaBr3, TaI3, and/or the like), chromium halides (e.g., CrF3, CrCl3, CrBr3, CrI3, and/or the like), molybdenum halides (e.g., MoF3, MoCl3, MoBr3, MoI3, and/or the like), tungsten halides (e.g., WF3, WCl3, WBr3, WI3, and/or the like), manganese halides (e.g., MnF2, MnCl2, MnBr2, MnI2, and/or the like), technetium halides (e.g., TcF2, TcCl2, TcBr2, TcI2, and/or the like), rhenium halides (e.g., ReF2, ReCl2, ReBr2, ReI2, and/or the like), ferrous halides (e.g., FeF2, FeCl2, FeBr2, FeI2, and/or the like), ruthenium halides (e.g., RuF2, RuCl2, RuBr2, RuI2, and/or the like), osmium halide (e.g., OsF2, OsCl2, OsBr2, OsI2, and/or the like), cobalt halides (e.g., CoF2, CoCl2, CoBr2, CoI2, and/or the like), rhodium halides (e.g., RhF2, RhCl2, RhBr2, RhI2, and/or the like), iridium halides (e.g., IrF2, IrCl2, IrBr2, IrI2, and/or the like), nickel halides (e.g., NiF2, NiCl2, NiBr2, NiI2, and/or the like), palladium halides (e.g., PdF2, PdCl2, PdBr2, PdI2, and/or the like), platinum halides (e.g., PtF2, PtCl2, PtBr2, PtI2, and/or the like), cuprous halides (e.g., CuF, CuCl, CuBr, CuI, and/or the like), silver halides (e.g., AgF, AgCl, AgBr, AgI, and/or the like), gold halides (e.g., AUF, AuCl, AuBr, AuI, and/or the like), and/or the like.
Non-limiting examples of the post-transition metal halide may be zinc halides (e.g., ZnF2, ZnCl2, ZnBr2, ZnI2, and/or the like), indium halides (e.g., InI3, and/or the like), tin halides (e.g., SnI2, and/or the like), and/or the like.
Non-limiting examples of the lanthanide metal halide may be YbF, YbF2, YbF3, SmF3, YbCl, YbCl2, YbCl3, SmCl3, YbBr, YbBr2, YbBr3, SmBr3, YbI, YbI2, YbI3, SmI3, and/or the like.
Non-limiting examples of the metalloid halide may be antimony halides (e.g., SbCl5, and/or the like) and/or the like.
Non-limiting examples of the metal telluride may be alkali metal tellurides (e.g., Li2Te, Na2Te, K2Te, Rb2Te, Cs2Te, and/or the like), alkaline earth metal tellurides (e.g., BeTe, MgTe, CaTe, SrTe, BaTe, and/or the like), transition metal tellurides (e.g., TiTe2, ZrTe2, HfTe2, V2Te3, Nb2Te3, Ta2Te3, Cr2Te3, MozTe3, W2Te3, MnTe, TcTe, ReTe, FeTe, RuTe, OsTe, CoTe, RhTe, IrTe, NiTe, PdTe, PtTe, Cu2Te, CuTe, Ag2Te, AgTe, Au2Te, and/or the like), post-transition metal tellurides (e.g., ZnTe, and/or the like), lanthanide metal tellurides (e.g., LaTe, CeTe, PrTe, NdTe, PmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe, LuTe, and/or the like), and/or the like.
When the light-emitting device 10 is a full-color light-emitting device, the emission layer may be patterned into a red emission layer, a green emission layer, and/or a blue emission layer, according to a subpixel. In one or more embodiments, the emission layer may have a stacked structure of two or more layers selected from among a red emission layer, a green emission layer, and a blue emission layer, in which the two or more layers contact each other or are separated from each other, to emit white light (e.g., combined white light). In one or more embodiments, the emission layer may include two or more materials selected from among a red light-emitting material, a green light-emitting material, and a blue light-emitting material, in which the two or more materials are mixed with each other in a single layer, to emit white light (e.g., combined white light).
In one or more embodiments, the emission layer may further include an auxiliary dopant. The dopant may include a phosphorescent dopant, a fluorescent dopant, or a (e.g., any suitable) combination thereof.
An amount of the dopant in the emission layer may be in a range of about 0.01 parts by weight to about 15 parts by weight based on 100 parts by weight of the host.
In one or more embodiments, the emission layer may include a quantum dot.
In one or more embodiments, the emission layer may include a delayed fluorescence material. The delayed fluorescence material may act as a host or a dopant in the emission layer.
A thickness of the emission layer may be in a range of about 100 Å to about 1,000 Å, for example, about 200 Å to about 600 Å. When the thickness of the emission layer is within the ranges described above, excellent or suitable luminescence characteristics may be obtained without a substantial increase in driving voltage.
In one or more embodiments, the host may include a compound represented by Formula 301:
[Ar301]xb11-[(L301)xb1-R301]xb21, Formula 301
wherein, in Formula 301,
In one or more embodiments, if (e.g., when) xb11 in Formula 301 is 2 or more, two or more of Ar301(s) may be linked to each other via a single bond.
In one or more embodiments, the host may include a compound represented by Formula 301-1, a compound represented by Formula 301-2, or a (e.g., any suitable) combination thereof:
In one or more embodiments, the host may include an alkaline earth metal complex, a post-transition metal complex, or a (e.g., any suitable) combination thereof. For example, in some embodiments, the host may include a Be complex (e.g., Compound H55), a Mg complex, a Zn complex, or a (e.g., any suitable) combination thereof.
In one or more embodiments, the host may include: at least one selected from among Compounds H1 to H128; 9,10-di(2-naphthyl) anthracene (ADN); 2-methyl-9,10-bis(naphthalen-2-yl) anthracene (MADN); 9,10-di-(2-naphthyl)-2-t-butyl-anthracene (TBADN); 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP); 1,3-di(9H-carbazol-9-yl)benzene (mCP); 1,3,5-tri (carbazol-9-yl)benzene (TCP); or a (e.g., any suitable) combination thereof:
The phosphorescent dopant may include at least one transition metal as a central metal.
The phosphorescent dopant may include a monodentate ligand, a bidentate ligand, a tridentate ligand, a tetradentate ligand, a pentadentate ligand, a hexadentate ligand, or a (e.g., any suitable) combination thereof.
The phosphorescent dopant may be electrically neutral.
In one or more embodiments, the phosphorescent dopant may include an organometallic compound represented by Formula 401:
In one or more embodiments, in Formula 402, i) X401 may be nitrogen, and X402 may be carbon, or ii) each of X401 and X402 may be nitrogen.
In one or more embodiments, if (e.g., when) xc1 in Formula 401 is 2 or more, two of ring A401(s) among two or more of L401(s) may optionally be linked to each other via T402, which is a linking group, and/or two of ring A402(s) among two or more of L401(s) may optionally be linked to each other via T403, which is a linking group (see Compounds PD1 to PD4 and PD7). T402 and T403 may each independently be the same as described with respect to T401.
In Formula 401, L402 may be an organic ligand. For example, L402 may include a halogen, a diketone group (e.g., an acetylacetonate group), a carboxylic acid group (e.g., a picolinate group), —C(═O), an isonitrile group, a —CN group, a phosphorus-containing group (e.g., a phosphine group, a phosphite group, and/or the like), or a (e.g., any suitable) combination thereof.
In one or more embodiments, the phosphorescent dopant may include, for example, one selected from among Compounds PD1 to PD39, or a (e.g., any suitable) combination thereof:
The fluorescent dopant may include an amine group-containing compound, a styryl group-containing compound, or a (e.g., any suitable) combination thereof.
In one or more embodiments, the fluorescent dopant may include a compound represented by Formula 501:
In one or more embodiments, Ar501 in Formula 501 may be a condensed cyclic group (e.g., an anthracene group, a chrysene group, a pyrene group, and/or the like) in which three or more monocyclic groups are condensed with each other.
In one or more embodiments, xd4 in Formula 501 may be 2.
In one or more embodiments, the fluorescent dopant may include: at least one selected from among Compounds FD1 to FD37; 4,4′-bis(2,2-diphenylvinyl)-1,1′-biphenyl (DPVBi); 4,4′-bis[4-(N,N-diphenylamino)styryl]biphenyl (DPAVBi); or a (e.g., any suitable) combination thereof:
The emission layer may include a delayed fluorescence material.
The delayed fluorescence material described herein may be of (e.g., may be any one selected from among) compounds capable of emitting delayed fluorescence based on a delayed fluorescence emission mechanism.
The delayed fluorescence material included in the emission layer may act as a host or a dopant depending on the type or kind of other materials included in the emission layer.
In one or more embodiments, a difference between a triplet energy level (eV) of the delayed fluorescence material and a singlet energy level (eV) of the delayed fluorescence material may be at least about 0 eV but not more than about 0.5 eV. When the difference between the triplet energy level (eV) of the delayed fluorescence material and the singlet energy level (eV) of the delayed fluorescence material is satisfied within the range above, up-conversion from the triplet state to the singlet state of the delayed fluorescence material may effectively occur, and thus, the light-emitting device 10 may have improved luminescence efficiency.
In one or more embodiments, the delayed fluorescence material may include i) a material including at least one electron donor (e.g., a π electron-rich C3-C60 cyclic group, such as a carbazole group, and/or the like) and at least one electron acceptor (e.g., a sulfoxide group, a cyano group, a π electron-deficient nitrogen-containing C1-C60 cyclic group, and/or the like), ii) a material including a C8-C60 polycyclic group in which two or more cyclic groups are condensed while sharing boron (B), and/or the like.
Non-limiting examples of the delayed fluorescence material may include at least one selected from among Compounds DF1 to DF14:
In one or more embodiments, the emission layer may include a quantum dot.
The term “quantum dot” as utilized herein refers to a crystal of a semiconductor compound, and may include any material capable of emitting light of one or more suitable emission wavelengths according to the size of the crystal.
A diameter of the quantum dot may be, for example, in a range of about 1 nm to about 10 nm. In the present disclosure, when quantum dot, quantum dots, or quantum dot particles are spherical, “diameter” indicates a particle diameter or an average particle diameter, and when the particles are non-spherical, the “diameter” indicates a major axis length or an average major axis length. The diameter of the particles may be measured utilizing a scanning electron microscope or a particle size analyzer. As the particle size analyzer, for example, HORIBA, LA-950 laser particle size analyzer, may be utilized. When the size of the particles is measured utilizing a particle size analyzer, the average particle diameter is referred to as D50. D50 refers to the average diameter of particles whose cumulative volume corresponds to 50 vol % in the particle size distribution (e.g., cumulative distribution), and refers to the value of the particle size corresponding to 50% from the smallest particle when the total number of particles is 100% in the distribution curve accumulated in the order of the smallest particle size to the largest particle size.
The quantum dot may be synthesized by a wet chemical process, a metal organic chemical vapor deposition process, a molecular beam epitaxy process, or any process similar thereto.
The wet chemical process is a method including mixing a precursor material of a quantum dot with an organic solvent and then growing a quantum dot particle crystal. When the crystal grows, the organic solvent naturally acts as a dispersant coordinated on the surface of the quantum dot crystal and controls the growth of the crystal so that the growth of quantum dot particles may be controlled or selected through a process which costs lower, and is easier than vapor deposition methods, such as metal organic chemical vapor deposition (MOCVD) or molecular beam epitaxy (MBE).
The quantum dot may include: a Group II-VI semiconductor compound; a Group III-V semiconductor compound; a Group III-VI semiconductor compound; a Group I-III-VI semiconductor compound; a Group IV-VI semiconductor compound; a Group IV element or compound; or a (e.g., any suitable) combination thereof.
Non-limiting examples of the Group II-VI semiconductor compound are: a binary compound, such as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, and/or the like; a ternary compound, such as CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS, and/or the like; a quaternary compound, such as CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, and/or the like; or a (e.g., any suitable) combination thereof.
Non-limiting examples of the Group III-V semiconductor compound are: a binary compound, such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and/or the like; a ternary compound, such as GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAs, InNSb, InPAs, InPSb, and/or the like; a quaternary compound, such as GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and/or the like; or a (e.g., any suitable) combination thereof. In one or more embodiments, the Group III-V semiconductor compound may further include a Group II element. Non-limiting examples of the Group III-V semiconductor compound further including the Group II element are InZnP, InGaZnP, InAlZnP, and/or the like.
Non-limiting examples of the Group III-VI semiconductor compound are: a binary compound, such as GaS, GaSe, Ga2Se3, GaTe, InS, InSe, In2S3, In2Se3, InTe, and/or the like; a ternary compound, such as InGaS3, InGaSe3, and/or the like; or a (e.g., any suitable) combination thereof.
Non-limiting examples of the Group I-III-VI semiconductor compound are: a ternary compound, such as AgInS, AgInS2, CuInS, CuInS2, CuGaO2, AgGaO2, AgAlO2, and/or the like; or a (e.g., any suitable) combination thereof.
Non-limiting examples of the Group IV-VI semiconductor compound are: a binary compound, such as SnS, SnSe, SnTe, PbS, PbSe, PbTe, and/or the like; a ternary compound, such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and/or the like; a quaternary compound, such as SnPbSSe, SnPbSeTe, SnPbSTe, and/or the like; or a (e.g., any suitable) combination thereof.
Non-limiting examples of the Group IV element or compound are: a single element compound, such as Si, Ge, and/or the like; a binary compound, such as SiC, SiGe, and/or the like; or a (e.g., any suitable) combination thereof.
Each element included in a multi-element compound, such as the binary compound, the ternary compound, and the quaternary compound, may be present at a substantially uniform concentration or non-substantially uniform concentration in a particle.
In one or more embodiments, the quantum dot may have a single structure in which the concentration of each element in the quantum dot is substantially uniform, or may have a core-shell dual structure. For example, a material included in the core and a material included in the shell may be different from each other.
The shell of the quantum dot may act as a protective layer which prevents chemical denaturation of the core to maintain semiconductor characteristics, and/or as a charging layer which imparts electrophoretic characteristics to the quantum dot. The shell may be single-layered or multi-layered. The interface between the core and the shell may have a concentration gradient in which the concentration of an element existing in the shell decreases toward the center of the core.
Examples of the shell of the quantum dot are an oxide of metal, metalloid, or non-metal, a semiconductor compound, and/or a (e.g., any suitable) combination thereof. Non-limiting examples of the oxide of metal, metalloid, or non-metal are: a binary compound, such as SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4, NiO, and/or the like; a ternary compound, such as MgAl2O4, CoFe2O4, NiFe2O4, CoMn2O4, and/or the like; or a (e.g., any suitable) combination thereof. Examples of the semiconductor compound are: as described herein, a Group II-VI semiconductor compound; a Group III-V semiconductor compound; a Group III-VI semiconductor compound; a Group I-III-VI semiconductor compound; a Group IV-VI semiconductor compound; or a (e.g., any suitable) combination thereof. Non-limiting examples of the semiconductor compound suitable as a shell are CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, or a (e.g., any suitable) combination thereof.
The quantum dot may have a full width at half maximum (FWHM) of an emission wavelength spectrum of about 45 nm or less, about 40 nm or less, or for example, about 30 nm or less. When the FWHM of the quantum dot is within these ranges, the quantum dot may have improved color purity or improved color reproducibility. In one or more embodiments, because light emitted through the quantum dot is emitted in all directions, the wide viewing angle may be improved.
In one or more embodiments, the quantum dot may be in the form of a spherical particle, a pyramidal particle, a multi-arm particle, a cubic nanoparticle, a nanotube particle, a nanowire particle, a nanofiber particle, a nanoplate particle, and/or the like.
Because the energy band gap of the quantum dot may be adjusted by controlling the size of the quantum dot, light having one or more suitable wavelength bands may be obtained from a quantum dot emission layer. Accordingly, by utilizing quantum dots of different sizes, a light-emitting device that emits light of one or more suitable wavelengths may be implemented. For example, in one or more embodiments, the size of the quantum dots may be selected to enable the quantum dots to emit red light, green light, and/or blue light. In one or more embodiments, the quantum dots with suitable sizes may be configured to emit white light by combination of light of one or more suitable colors.
The electron transport region may have i) a single-layer structure including (e.g., consisting of) a single layer including (e.g., consisting of) a single material, ii) a single-layer structure including (e.g., consisting of) a single layer including multiple materials that are different from each other, or iii) a multi-layer structure including multiple layers including multiple materials that are different from each other.
The electron transport region may include a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, an electron injection layer, or a (e.g., any suitable) combination thereof.
In one or more embodiments, the electron transport region may have an electron transport layer/electron injection layer structure, a hole blocking layer/electron transport layer/electron injection layer structure, an electron control layer/electron transport layer/electron injection layer structure, or a buffer layer/electron transport layer/electron injection layer structure, wherein constituent layers of each structure are sequentially stacked from the emission layer in the stated order.
In one or more embodiments, the electron transport region (e.g., the buffer layer, the hole blocking layer, the electron control layer, or the electron transport layer in the electron transport region) may include a metal-free compound including at least one π electron-deficient nitrogen-containing C1-C60 cyclic group.
In one or more embodiments, the electron transport region may include a compound represented by Formula 601:
[Ar601]xe11-[(L601)xe1-R601]xe21, Formula 601
In one or more embodiments, if (e.g., when) xe11 in Formula 601 is 2 or more, two or more of Ar601(s) may be linked to each other via a single bond.
In one or more embodiments, Ar601 in Formula 601 may be an anthracene group unsubstituted or substituted with at least one R10a.
In one or more embodiments, the electron transport region may include a compound represented by Formula 601-1:
In one or more embodiments, xe1 and xe611 to xe613 in Formulae 601 and 601-1 may each independently be 0, 1, or 2.
In one or more embodiments, the electron transport region may include: at least one selected from among Compounds ET1 to ET45; 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP); 4,7-diphenyl-1,10-phenanthroline (Bphen); tris(8-hydroxyquinolinato)aluminum (Alq3); bis(2-methyl-8-quinolinolato-N1,O8)-(1,1′-biphenyl-4-olato)aluminum (BAlq); 3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole (TAZ); 4-(naphthalen-1-yl)-3,5-diphenyl-4H-1,2,4-triazole NTAZ); or a (e.g., any suitable) combination thereof:
A thickness of the electron transport region may be in a range of about 100 Å to about 5,000 Å, for example, about 160 Å to about 4,000 Å. When the electron transport region includes a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, or a (e.g., any suitable) combination thereof, a thickness of the buffer layer, the hole blocking layer, or the electron control layer may be in a range of about 20 Å to about 1,000 Å, for example, about 30 Å to about 300 Å, and a thickness of the electron transport layer may be in a range of about 100 Å to about 1,000 Å, for example, about 150 Å to about 500 Å. When the thicknesses of the buffer layer, the hole blocking layer, the electron control layer, the electron transport layer, and/or the electron transport region are within the ranges described above, satisfactory electron transporting characteristics may be obtained without a substantial increase in driving voltage.
In one or more embodiments, the electron transport region (e.g., the electron transport layer in the electron transport region) may further include, in addition to one or more of the materials described above, a metal-containing material.
The metal-containing material may include an alkali metal complex, an alkaline earth metal complex, or a (e.g., any suitable) combination thereof. A metal ion of the alkali metal complex may be a Li ion, a Na ion, a K ion, a Rb ion, or a Cs ion, and a metal ion of the alkaline earth metal complex may be a Be ion, a Mg ion, a Ca ion, a Sr ion, or a Ba ion. A ligand coordinated with the metal ion of the alkali metal complex or the metal ion of the alkaline earth-metal complex may include hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthroline, cyclopentadiene, or a (e.g., any suitable) combination thereof.
In one or more embodiments, the metal-containing material may include a Li complex. The Li complex may include, for example, Compound ET-D1 (LiQ) or ET-D2:
In one or more embodiments, the electron transport region may include an electron injection layer that facilitates the injection of electrons from the second electrode 150. The electron injection layer may directly contact the second electrode 150.
The electron injection layer may have i) a single-layer structure including (e.g., consisting of) a single layer including (e.g., consisting of) a single material, ii) a single-layer structure including (e.g., consisting of) a single layer including multiple materials that are different from each other, or iii) a multi-layer structure including multiple layers including multiple materials that are different from each other.
In one or more embodiments, the electron injection layer may include an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal-containing compound, an alkaline earth metal-containing compound, a rare earth metal-containing compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or a (e.g., any suitable) combination thereof.
The alkali metal may include Li, Na, K, Rb, Cs, or a (e.g., any suitable) combination thereof. The alkaline earth metal may include Mg, Ca, Sr, Ba, or a (e.g., any suitable) combination thereof. The rare earth metal may include Sc, Y, Ce, Tb, Yb, Gd, or a (e.g., any suitable) combination thereof.
The alkali metal-containing compound, the alkaline earth metal-containing compound, and the rare earth metal-containing compound may be oxides, halides (e.g., fluorides, chlorides, bromides, iodides, and/or the like), or tellurides of the alkali metal, the alkaline earth metal, and the rare earth metal, respectively, or a (e.g., any suitable) combination thereof.
The alkali metal-containing compound may include: alkali metal oxides, such as Li2O, Cs2O, K2O, and/or the like; alkali metal halides, such as LiF, NaF, CsF, KF, LiI, NaI, CsI, KI, and/or the like; or a (e.g., any suitable) combination thereof. The alkaline earth metal-containing compound may include an alkaline earth metal compound, such as BaO, SrO, CaO, BaxSr1-xO (wherein x is a real number satisfying 0<x<1), BaxCa1-xO (wherein x is a real number satisfying 0<x<1), and/or the like. The rare earth metal-containing compound may include YbF3, ScF3, Sc2O3, Y2O3, Ce2O3, GdF3, TbF3, YbI3, ScI3, TbI3, or a (e.g., any suitable) combination thereof. In one or more embodiments, the rare earth metal-containing compound may include a lanthanide metal telluride. Non-limiting examples of the lanthanide metal telluride are LaTe, CeTe, PrTe, NdTe, PmTe, SmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe, LuTe, La2Te3, Ce2Te3, Pr2Te3, Nd2Te3, Pm2Te3, Sm2Te3, Eu2Te3, Gd2Te3, Tb2Te3, Dy2Te3, Ho2Te3, Er2Te3, Tm2Te3, Yb2Te3, Lu2Te3, and/or the like.
The alkali metal complex, the alkaline earth-metal complex, and the rare earth metal complex may include i) one of metal ions of the alkali metal, one of metal ions of the alkaline earth metal, and one of metal ions of the rare earth metal, respectively, and ii) a ligand bonded to the respective metal ion, for example, hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthroline, cyclopentadiene, or a (e.g., any suitable) combination thereof.
In one or more embodiments, the electron injection layer may include (e.g., consist of) an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal-containing compound, an alkaline earth metal-containing compound, a rare earth metal-containing compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or a (e.g., any suitable) combination thereof, as described above. In one or more embodiments, the electron injection layer may further include an organic material (e.g., a compound represented by Formula 601).
In one or more embodiments, the electron injection layer may include (e.g., consist of) i) an alkali metal-containing compound (e.g., alkali metal halide), or ii) a) an alkali metal-containing compound (e.g., alkali metal halide); and b) an alkali metal, an alkaline earth metal, a rare earth metal, or a (e.g., any suitable) combination thereof. For example, in some embodiments, the electron injection layer may be a KI:Yb co-deposited layer, an RbI:Yb co-deposited layer, a LiF:Yb co-deposited layer, and/or the like.
When the electron injection layer further includes an organic material, an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal-containing compound, an alkaline earth metal-containing compound, a rare earth metal-containing compound, an alkali metal complex, an alkaline earth-metal complex, a rare earth metal complex, or a (e.g., any suitable) combination thereof may be uniformly (substantially uniformly) or non-uniformly dispersed in a matrix including the organic material.
A thickness of the electron injection layer may be in a range of about 1 Å to about 100 Å, and, for example, about 3 Å to about 90 Å. When the thickness of the electron injection layer is within the ranges described above, satisfactory electron injection characteristics may be obtained without a substantial increase in driving voltage.
The second electrode 150 may be arranged on the interlayer 130 having a structure as described above. The second electrode 150 may be a cathode, which is an electron injection electrode, and as a material for forming (or providing) the second electrode 150, a metal, an alloy, an electrically conductive compound, or a (e.g., any suitable) combination thereof, each having a low-work function, may be utilized.
The second electrode 150 may include lithium (Li), silver (Ag), magnesium (Mg), aluminum (Al), aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), magnesium-silver (Mg—Ag), ytterbium (Yb), silver-ytterbium (Ag—Yb), ITO, IZO, or a (e.g., any suitable) combination thereof. The second electrode 150 may be a transmissive electrode, a semi-transmissive electrode, or a reflective electrode.
The second electrode 150 may have a single-layer structure or a multi-layer structure including multiple layers.
A first capping layer may be arranged outside (e.g., on) the first electrode 110, and/or a second capping layer may be arranged outside (e.g., on) the second electrode 150. For example, in one or more embodiments, the light-emitting device 10 may have a structure in which the first capping layer, the first electrode 110, the interlayer 130, and the second electrode 150 are sequentially stacked in the stated order, a structure in which the first electrode 110, the interlayer 130, the second electrode 150, and the second capping layer are sequentially stacked in the stated order, or a structure in which the first capping layer, the first electrode 110, the interlayer 130, the second electrode 150, and the second capping layer are sequentially stacked in the stated order.
In some embodiments, light generated in the emission layer of the interlayer 130 of the light-emitting device 10 may be extracted toward the outside through the first electrode 110 which is a semi-transmissive electrode or a transmissive electrode, and the first capping layer. In some embodiments, light generated in the emission layer of the interlayer 130 of the light-emitting device 10 may be extracted toward the outside through the second electrode 150 which is a semi-transmissive electrode or a transmissive electrode, and the second capping layer.
The first capping layer and the second capping layer may increase external emission efficiency according to the principle of constructive interference. Accordingly, the light extraction efficiency of the light-emitting device 10 is increased, so that the luminescence efficiency of the light-emitting device 10 may be improved.
Each of the first capping layer and the second capping layer may include a material having a refractive index of 1.6 or more (e.g., at 589 nm).
The first capping layer and the second capping layer may each independently be an organic capping layer including an organic material, an inorganic capping layer including an inorganic material, or an organic-inorganic composite capping layer including an organic material and an inorganic material.
At least one of the first capping layer or the second capping layer may (e.g., the first capping layer and the second capping layer may each independently) include a carbocyclic compound, a heterocyclic compound, an amine group-containing compound, a porphine derivative, a phthalocyanine derivative, a naphthalocyanine derivative, an alkali metal complex, an alkaline earth metal complex, or a (e.g., any suitable) combination thereof. The carbocyclic compound, the heterocyclic compound, and the amine group-containing compound may each optionally be substituted with a substituent including O, N, S, Se, Si, F, Cl, Br, I, or a (e.g., any suitable) combination thereof. In one or more embodiments, at least one of the first capping layer or the second capping layer may (e.g., the first capping layer and the second capping layer may each independently) include an amine group-containing compound.
In one or more embodiments, at least one of the first capping layer or the second capping layer may (e.g., the first capping layer and the second capping layer may each independently) include a compound represented by Formula 201, a compound represented by Formula 202, or a (e.g., any suitable) combination thereof.
In one or more embodiments, at least one of the first capping layer or the second capping layer may (e.g., the first capping layer and the second capping layer may each independently) include at least one selected from among Compounds HT28 to HT33, at least one selected from among Compounds CP1 to CP6, β-NPB, or a (e.g., any suitable) combination thereof:
The heterocyclic compound represented by Formula 1 may be included in one or more suitable films. Accordingly, one or more aspects of embodiments of the present disclosure are directed toward a film including the heterocyclic compound represented by Formula 1. The film may be, for example, an optical member (or a light control element) (e.g., a color filter, a color conversion member, a capping layer, a light extraction efficiency enhancement layer, a selective light absorbing layer, a polarizing layer, a quantum dot-containing layer, and/or the like), a light blocking member (e.g., a light reflective layer, a light absorbing layer, and/or the like), a protective member (e.g., an insulating layer, a dielectric layer, and/or the like), and/or the like.
The light-emitting device may be included in one or more suitable electronic apparatuses. For example, the electronic apparatus including the light-emitting device may be a light-emitting apparatus, an authentication apparatus, and/or the like.
In one or more embodiments, the electronic apparatus (e.g., a light-emitting apparatus) may further include, in addition to the light-emitting device, i) a color filter, ii) a color conversion layer, or iii) a color filter and a color conversion layer. The color filter and/or the color conversion layer may be arranged in at least one travel direction of light emitted from the light-emitting device. For example, in one or more embodiments, the light emitted from the light-emitting device may be blue light or white light (e.g., combined white light). Details on the light-emitting device may be the same as described herein. In one or more embodiments, the color conversion layer may include a quantum dot. The quantum dot may be, for example, the quantum dot as described herein.
The electronic apparatus may include a first substrate. The first substrate may include a plurality of subpixel areas, the color filter may include a plurality of color filter areas respectively corresponding to the subpixel areas, and the color conversion layer may include a plurality of color conversion areas respectively corresponding to the subpixel areas.
A pixel defining layer may be arranged among the subpixel areas to define each of the subpixel areas.
The color filter may further include a plurality of color filter areas and light-shielding patterns arranged among the color filter areas, and the color conversion layer may further include a plurality of color conversion areas and light-shielding patterns arranged among the color conversion areas.
The plurality of color filter areas (or the plurality of color conversion areas) may include a first area configured to emit first color light, a second area configured to emit second color light, and/or a third area configured to emit third color light, wherein the first color light, the second color light, and/or the third color light may have different maximum emission wavelengths. For example, in one or more embodiments, the first color light may be red light, the second color light may be green light, and the third color light may be blue light. For example, in one or more embodiments, the plurality of color filter areas (or the plurality of color conversion areas) may include quantum dots. For example, in some embodiments, the first area may include a red quantum dot to emit red light, the second area may include a green quantum dot to emit green light, and the third area may not include (e.g., may exclude) a quantum dot. Details on the quantum dot may be the same as described herein. The first area, the second area, and/or the third area may each further include a scatter.
In one or more embodiments, the light-emitting device may be to emit first light, the first area may be to absorb the first light to emit first-first color light, the second area may be to absorb the first light to emit second-first color light, and the third area may be to absorb the first light to emit third-first color light. In this regard, the first-first color light, the second-first color light, and the third-first color light may have different maximum emission wavelengths. For example, in some embodiments, the first light may be blue light, the first-first color light may be red light, the second-first color light may be green light, and the third-first color light may be blue light.
In one or more embodiments, the electronic apparatus may further include a thin-film transistor, in addition to the light-emitting device as described above. The thin-film transistor may include a source electrode, a drain electrode, and an activation layer, wherein one selected from the source electrode and the drain electrode may be electrically connected to the first electrode or the second electrode of the light-emitting device.
The thin-film transistor may further include a gate electrode, a gate insulating film, and/or the like.
The activation layer may include crystalline silicon, amorphous silicon, an organic semiconductor, an oxide semiconductor, and/or the like.
In one or more embodiments, the electronic apparatus may further include a sealing portion for sealing the light-emitting device. The sealing portion may be arranged between the color filter and/or the color conversion layer and the light-emitting device. The sealing portion allows light from the light-emitting device to be extracted to the outside, and concurrently (e.g., simultaneously) prevents ambient air and moisture from penetrating into the light-emitting device. The sealing portion may be a sealing substrate including a transparent glass substrate or a plastic substrate. The sealing portion may be a thin-film encapsulation layer including at least one layer of an organic layer and/or an inorganic layer. When the sealing portion is a thin-film encapsulation layer, the electronic apparatus may be flexible.
Various functional layers may be additionally arranged on the sealing portion, in addition to the color filter and/or the color conversion layer, according to the utilization of the electronic apparatus. Non-limiting examples of the functional layers are a touch screen layer, a polarizing layer, and/or the like. The touch screen layer may be a pressure-sensitive touch screen layer, a capacitive touch screen layer, or an infrared touch screen layer.
The authentication apparatus may be, for example, a biometric authentication apparatus that authenticates an individual by utilizing biometric information of a living body (e.g., fingertips, pupils, and/or the like).
The authentication apparatus may further include, in addition to the light-emitting device as described above, a biometric information collector.
The electronic apparatus may be applied to one or more of displays, light sources, lighting, personal computers (e.g., a mobile personal computer), mobile phones, digital cameras, electronic organizers, electronic dictionaries, electronic game machines, medical instruments (e.g., electronic thermometers, sphygmomanometers, blood glucose meters, pulse measurement devices, pulse wave measurement devices, electrocardiogram displays, ultrasonic diagnostic devices, or endoscope displays), fish finders, one or more suitable measuring instruments, meters (e.g., meters for a vehicle, an aircraft, and a vessel), projectors, and/or the like.
The light-emitting device may be included in one or more suitable electronic equipment.
In one or more embodiments, the electronic equipment including the light-emitting device may be at least one of a flat panel display, a curved display, a computer monitor, a medical monitor, a television, a billboard, an indoor or outdoor light and/or light for signal, a head-up display, a fully or partially transparent display, a flexible display, a rollable display, a foldable display, a stretchable display, a laser printer, a telephone, a mobile phone, a tablet, a phablet, a personal digital assistant (PDA), a wearable device, a laptop computer, a digital camera, a camcorder, a viewfinder, a micro display, a three-dimensional (3D) display, a virtual reality or augmented reality display, a vehicle, a video wall with multiple displays tiled together, a theater or stadium screen, a phototherapy device, or a signboard.
The light-emitting device may have excellent or suitable luminescence efficiency and long lifespan, and thus, the electronic equipment including the light-emitting device may have characteristics such as relatively high luminance, relatively high resolution, and relatively low power consumption.
The light-emitting apparatus of
The substrate 100 may be a flexible substrate, a glass substrate, or a metal substrate. A buffer layer 210 may be on the substrate 100. The buffer layer 210 may prevent or reduce penetration of impurities through the substrate 100 and may provide a flat surface on the substrate 100.
The TFT may be on the buffer layer 210. The TFT may include an activation layer 220, a gate electrode 240, a source electrode 260, and a drain electrode 270.
The activation layer 220 may include an inorganic semiconductor, such as silicon or polysilicon, an organic semiconductor, or an oxide semiconductor, and may include a source region, a drain region, and a channel region.
A gate insulating film 230 for insulating the activation layer 220 from the gate electrode 240 may be on the activation layer 220, and the gate electrode 240 may be on the gate insulating film 230.
An interlayer insulating film 250 may be on the gate electrode 240. The interlayer insulating film 250 may be arranged between the gate electrode 240 and the source electrode 260 and between the gate electrode 240 and the drain electrode 270, to insulate from one another.
The source electrode 260 and the drain electrode 270 may be on the interlayer insulating film 250. The interlayer insulating film 250 and the gate insulating film 230 may be formed to expose the source region and the drain region of the activation layer 220, and the source electrode 260 and the drain electrode 270 may be arranged in contact with the exposed portions of the source region and the drain region of the activation layer 220, respectively.
The TFT may be electrically connected to a light-emitting device to drive the light-emitting device, and may be covered and protected by a passivation layer 280. The passivation layer 280 may include an inorganic insulating film, an organic insulating film, or a (e.g., any suitable) combination thereof. The light-emitting device may be provided on the passivation layer 280. The light-emitting device may include a first electrode 110, an interlayer 130, and a second electrode 150.
The first electrode 110 may be on the passivation layer 280. The passivation layer 280 may be arranged to expose a portion of the drain electrode 270, not fully covering the drain electrode 270, and the first electrode 110 may be arranged to be connected to the exposed portion of the drain electrode 270.
A pixel defining layer 290 including an insulating material may be on the first electrode 110. The pixel defining layer 290 may expose a certain region of the first electrode 110, and the interlayer 130 may be formed in the exposed region of the first electrode 110. The pixel defining layer 290 may be a polyimide-based organic film or a polyacrylic-based organic film. In some embodiments, at least some layers of the interlayer 130 may extend beyond the upper portion of the pixel defining layer 290 to be arranged in the form of a common layer.
The second electrode 150 may be on the interlayer 130, and a capping layer 170 may be additionally formed on the second electrode 150. The capping layer 170 may be formed to cover the second electrode 150.
The encapsulation portion 300 may be on the capping layer 170. The encapsulation portion 300 may be arranged on the light-emitting device to protect the light-emitting device from moisture and/or oxygen. The encapsulation portion 300 may include: an inorganic film including silicon nitride (SiNx), silicon oxide (SiOx), indium tin oxide, indium zinc oxide, or a (e.g., any suitable) combination thereof; an organic film including polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyethylene sulfonate, polyoxymethylene, polyarylate, hexamethyldisiloxane, an acrylic-based resin (e.g., polymethyl methacrylate, polyacrylic acid, and/or the like), an epoxy-based resin (e.g., aliphatic glycidyl ether (AGE), and/or the like), or a (e.g., any suitable) combination thereof; or a (e.g., any suitable) combination of the inorganic films and the organic films.
The light-emitting apparatus of
The electronic equipment 1 may include a display area DA and a non-display area NDA outside the display area DA. A display device of the electronic equipment 1 may implement an image through an array of a plurality of pixels that are two-dimensionally arranged in the display area DA.
The non-display area NDA is an area that does not display an image, and may entirely be around (e.g., surround) the display area DA. On the non-display area NDA, a driver for providing electrical signals or power to display devices arranged on the display area DA may be arranged. On the non-display area NDA, a pad, which is an area to which an electronic element or a printing circuit board may be electrically connected, may be arranged.
In the electronic equipment 1, a length in the x-axis direction and a length (e.g., a width) in the y-axis direction may be different from each other. In one or more embodiments, as shown in
Referring to
In one or more embodiments, the vehicle 1000 may travel on a road or a track. The vehicle 1000 may move in a set or predetermined direction according to the rotation of at least one wheel thereof. For example, the vehicle 1000 may include a three-wheeled or four-wheeled vehicle, a construction machine, a two-wheeled vehicle, a prime mover device, a bicycle, or a train running on a track.
The vehicle 1000 may include a body having an interior and an exterior, and a chassis in which mechanical apparatuses necessary for driving are installed as other parts except for the body. The exterior of the body may include a front panel, a bonnet, a roof panel, a rear panel, a trunk, a pillar provided at a boundary between doors, and/or the like. The chassis of the vehicle 1000 may include a power generating device, a power transmitting device, a driving device, a steering device, a braking device, a suspension device, a transmission device, a fuel device, front and rear wheels, left and right wheels, and/or the like.
The vehicle 1000 may include a side window glass 1100, a front window glass 1200, a side mirror 1300, a cluster 1400, a center fascia 1500, a passenger seat dashboard 1600, and a display device 2.
The side window glass 1100 and the front window glass 1200 may be partitioned by a pillar arranged between the side window glass 1100 and the front window glass 1200.
The side window glass 1100 may be installed on a side of the vehicle 1000. In one or more embodiments, the side window glass 1100 may be installed on a door of the vehicle 1000. A plurality of side window glasses 1100 may be provided and may face each other. In one or more embodiments, the side window glass 1100 may include a first side window glass 1110 and a second side window glass 1120. In one or more embodiments, the first side window glass 1110 may be arranged adjacent to the cluster 1400. The second side window glass 1120 may be arranged adjacent to the passenger seat dashboard 1600.
In one or more embodiments, the side window glasses 1100 may be spaced and/or apart (e.g., spaced apart or separated) from each other in the x-direction or the −x-direction (the direction opposite the x-direction). For example, in some embodiments, the first side window glass 1110 and the second side window glass 1120 may be spaced and/or apart (e.g., spaced apart or separated) from each other in the x-direction or the −x-direction. For example, an imaginary straight line L connecting the side window glasses 1100 may extend in the x-direction or the −x-direction. For example, an imaginary straight line L connecting the first side window glass 1110 and the second side window glass 1120 to each other may extend in the x direction or the −x direction.
The front window glass 1200 may be installed in the front of the vehicle 1000. The front window glass 1200 may be arranged between the side window glasses 1100 facing each other.
The side mirror 1300 may provide a rear view of the vehicle 1000. The side mirror 1300 may be installed on the exterior of the vehicle body. In one or more embodiments, a plurality of side mirrors 1300 may be provided. Any one of the plurality of side mirrors 1300 may be arranged outside the first side window glass 1110. The other one of the plurality of side mirrors 1300 may be arranged outside the second side window glass 1120.
The cluster 1400 may be arranged in front of the steering wheel. The cluster 1400 may include a tachometer, a speedometer, a coolant thermometer, a fuel gauge turn indicator, a high beam indicator, a warning light, a seat belt warning light, an odometer, a tachograph, an automatic shift selector indicator, a door open warning light, an engine oil warning light, and/or a low fuel warning light.
The center fascia 1500 may include a control panel on which a plurality of buttons for adjusting an audio device, an air conditioning device, and a heater of a seat are arranged. The center fascia 1500 may be arranged on one side of the cluster 1400.
The passenger seat dashboard 1600 may be spaced and/or apart (e.g., spaced apart or separated) from the cluster 1400 with the center fascia 1500 arranged therebetween. In one or more embodiments, the cluster 1400 may be arranged to correspond to a driver seat, and the passenger seat dashboard 1600 may be arranged to correspond to a passenger seat. In one or more embodiments, the cluster 1400 may be adjacent to the first side window glass 1110, and the passenger seat dashboard 1600 may be adjacent to the second side window glass 1120.
In one or more embodiments, the display device 2 may include a display panel 3, and the display panel 3 may display an image. The display device 2 may be arranged inside the vehicle 1000. In one or more embodiments, the display device 2 may be arranged between the side window glasses 1100 facing each other. The display device 2 may be arranged on at least one of the cluster 1400, the center fascia 1500, or the passenger seat dashboard 1600.
The display device 2 may include an organic light-emitting display device, an inorganic light-emitting display device, a quantum dot display device, and/or the like. Hereinafter, as the display device 2 according to one or more embodiments of the disclosure, an organic light-emitting display device including the light-emitting device according to the disclosure will be described as an example, but one or more suitable types (kinds) of display devices as described above may be utilized in embodiments of the disclosure.
Referring to
Referring to
Referring to
The layers constituting the hole transport region, the emission layer, and the layers constituting the electron transport region may be formed in a certain region by utilizing one or more suitable methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) deposition, ink-jet printing, laser-printing, laser-induced thermal imaging, and/or the like.
When the layers constituting the hole transport region, the emission layer, and the layers constituting the electron transport region are formed by vacuum deposition, the deposition may be performed at a deposition temperature in a range of about 100° C. to about 500° C., at a vacuum degree in a range of about 10−8 torr to about 10−3 torr, and at a deposition speed/rate in a range of about 0.01 Å/sec to about 100 Å/sec, depending on a material to be included in a layer to be formed and the structure of a layer to be formed.
The term “C3-C60 carbocyclic group” as utilized herein refers to a cyclic group including (e.g., consisting of) carbon only as a ring-forming atom and having 3 to 60 carbon atoms, and the term “C1-C60 heterocyclic group” as utilized herein refers to a cyclic group that has 1 to 60 carbon atoms and further has, in addition to carbon, a heteroatom as a ring-forming atom. The C3-C60 carbocyclic group and the C1-C60 heterocyclic group may each be a monocyclic group including (e.g., consisting of) one (e.g., exactly one) ring or a polycyclic group in which two or more rings are condensed with each other. For example, the number of ring-forming atoms of the C1-C60 heterocyclic group may be from 3 to 61.
The “cyclic group” as utilized herein may include both (e.g., simultaneously) the C3-C60 carbocyclic group and the C1-C60 heterocyclic group.
The term “π electron-rich C3-C60 cyclic group” as utilized herein refers to a cyclic group that has 3 to 60 carbon atoms and does not include *—N═*′ as a ring-forming moiety, and the term “π electron-deficient nitrogen-containing C1-C60 cyclic group” as utilized herein refers to a heterocyclic group that has 1 to 60 carbon atoms and includes *—N═*′ as a ring-forming moiety.
For example,
The term “cyclic group,” “C3-C60 carbocyclic group,” “C1-C60 heterocyclic group,” “π electron-rich C3-C60 cyclic group,” or “π electron-deficient nitrogen-containing C1-C60 cyclic group” as utilized herein may refer to a group condensed to any cyclic group, a monovalent group, or a polyvalent group (e.g., a divalent group, a trivalent group, a tetravalent group, and/or the like) according to the structure of a formula for which the corresponding term is utilized. For example, the “benzene group” may be a benzo group, a phenyl group, a phenylene group, and/or the like, which may be easily understood by one of ordinary skill in the art according to the structure of a formula including the “benzene group.”
Depending on context, in the present disclosure, a divalent group may refer or be a polyvalent group (e.g., trivalent, tetravalent, etc., and not just divalent) per, e.g., the structure of a formula in connection with which of the terms are utilized.
Non-limiting examples of the monovalent C3-C60 carbocyclic group and monovalent C1-C60 heterocyclic group are a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, and non-limiting examples of the divalent C3-C60 carbocyclic group and the divalent C1-C60 heterocyclic group may include a C3-C10 cycloalkylene group, a C1-C10 heterocycloalkylene group, a C3-C10 cycloalkenylene group, a C1-C10 heterocycloalkenylene group, a C6-C60 arylene group, a C1-C60 heteroarylene group, a divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group.
The term “C1-C60 alkyl group” as utilized herein refers to a linear or branched aliphatic hydrocarbon monovalent group that has 1 to 60 carbon atoms, and non-limiting examples thereof are a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, an isobutyl group, a tert-butyl group, an n-pentyl group, a tert-pentyl group, a neopentyl group, an isopentyl group, a sec-pentyl group, a 3-pentyl group, a sec-isopentyl group, an n-hexyl group, an isohexyl group, a sec-hexyl group, a tert-hexyl group, an n-heptyl group, an isoheptyl group, a sec-heptyl group, a tert-heptyl group, an n-octyl group, an isooctyl group, a sec-octyl group, a tert-octyl group, an n-nonyl group, an isononyl group, a sec-nonyl group, a tert-nonyl group, an n-decyl group, an isodecyl group, a sec-decyl group, a tert-decyl group, and/or the like. The term “C1-C60 alkylene group” as utilized herein refers to a divalent group having substantially the same structure as the C1-C60 alkyl group.
The term “C2-C60 alkenyl group” as utilized herein refers to a monovalent hydrocarbon group having at least one carbon-carbon double bond in the middle or at the terminus of a C2-C60 alkyl group, and non-limiting examples thereof are an ethenyl group, a propenyl group, a butenyl group, and/or the like. The term “C2-C60 alkenylene group” as utilized herein refers to a divalent group having substantially the same structure as the C2-C60 alkenyl group.
The term “C2-C60 alkynyl group” as utilized herein refers to a monovalent hydrocarbon group having at least one carbon-carbon triple bond in the middle or at the terminus of a C2-C60 alkyl group, and non-limiting examples thereof are an ethynyl group, a propynyl group, and/or the like. The term “C2-C60 alkynylene group” as utilized herein refers to a divalent group having substantially the same structure as the C2-C60 alkynyl group.
The term “C1-C60 alkoxy group” as utilized herein refers to a monovalent group represented by —OA101 (wherein A101 is a C1-C60 alkyl group), and non-limiting examples thereof are a methoxy group, an ethoxy group, an isopropyloxy group, and/or the like.
The term “C3-C10 cycloalkyl group” as utilized herein refers to a monovalent saturated hydrocarbon cyclic group having 3 to 10 carbon atoms, and non-limiting examples thereof are a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornanyl group (or bicyclo[2.2.1]heptyl group), a bicyclo[1.1.1]pentyl group, a bicyclo[2.1.1]hexyl group, a bicyclo[2.2.2]octyl group, and/or the like. The term “C3-C10 cycloalkylene group” as utilized herein refers to a divalent group having substantially the same structure as the C3-C10 cycloalkyl group.
The term “C1-C10 heterocycloalkyl group” as utilized herein refers to a monovalent cyclic group of 1 to 10 carbon atoms, further including, in addition to carbon atoms, at least one heteroatom, as ring-forming atoms, and non-limiting examples thereof are a 1,2,3,4-oxatriazolidinyl group, a tetrahydrofuranyl group, a tetrahydrothiophenyl group, and/or the like. The term “C1-C10 heterocycloalkylene group” as utilized herein refers to a divalent group having substantially the same structure as the C1-C10 heterocycloalkyl group.
The term “C3-C10 cycloalkenyl group” as utilized herein refers to a monovalent cyclic group that has 3 to 10 carbon atoms and at least one carbon-carbon double bond in the ring thereof and no aromaticity, and non-limiting examples thereof are a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, and/or the like. The term “C3-C10 cycloalkenylene group” as utilized herein refers to a divalent group having substantially the same structure as the C3-C10 cycloalkenyl group.
The term “C1-C10 heterocycloalkenyl group” as utilized herein refers to a monovalent cyclic group of 1 to 10 carbon atoms, further including, in addition to carbon atoms, at least one heteroatom, as ring-forming atoms, and having at least one double bond in the cyclic structure thereof. Non-limiting examples of the C1-C10 heterocycloalkenyl group are a 4,5-dihydro-1,2,3,4-oxatriazolyl group, a 2,3-dihydrofuranyl group, a 2,3-dihydrothiophenyl group, and/or the like. The term “C1-C10 heterocycloalkenylene group” as utilized herein refers to a divalent group having substantially the same structure as the C1-C10 heterocycloalkenyl group.
The term “C6-C60 aryl group” as utilized herein refers to a monovalent group having a carbocyclic aromatic system of 6 to 60 carbon atoms, and the term “C6-C60 arylene group” as utilized herein refers to a divalent group having a carbocyclic aromatic system of 6 to 60 carbon atoms. Non-limiting examples of the C6-C60 aryl group are a phenyl group, a pentalenyl group, a naphthyl group, an azulenyl group, an indacenyl group, an acenaphthyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a perylenyl group, a pentaphenyl group, a heptalenyl group, a naphthacenyl group, a picenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, and/or the like. When the C6-C60 aryl group and the C6-C60 arylene group each include two or more rings, the rings may be condensed with each other.
The term “C1-C60 heteroaryl group” as utilized herein refers to a monovalent group having a heterocyclic aromatic system of 1 to 60 carbon atoms, further including, in addition to carbon atoms, at least one heteroatom, as ring-forming atoms. The term “C1-C60 heteroarylene group” as utilized herein refers to a divalent group having a heterocyclic aromatic system of 1 to 60 carbon atoms, further including, in addition to carbon atoms, at least one heteroatom, as ring-forming atoms. Non-limiting examples of the C1-C60 heteroaryl group are a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, a benzoquinolinyl group, an isoquinolinyl group, a benzoisoquinolinyl group, a quinoxalinyl group, a benzoquinoxalinyl group, a quinazolinyl group, a benzoquinazolinyl group, a cinnolinyl group, a phenanthrolinyl group, a phthalazinyl group, a naphthyridinyl group, and/or the like. When the C1-C60 heteroaryl group and the C1-C60 heteroarylene group each include two or more rings, the rings may be condensed with each other.
The term “monovalent non-aromatic condensed polycyclic group” as utilized herein refers to a monovalent group (e.g., having 8 to 60 carbon atoms) having two or more rings condensed to each other, only carbon atoms as ring-forming atoms, and no aromaticity in its entire molecular structure when considered as a whole. Non-limiting examples of the monovalent non-aromatic condensed polycyclic group are an indenyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, an indenophenanthrenyl group, an indeno anthracenyl group, and/or the like. The term “divalent non-aromatic condensed polycyclic group” as utilized herein refers to a divalent group having substantially the same structure as the monovalent non-aromatic condensed polycyclic group.
The term “monovalent non-aromatic condensed heteropolycyclic group” as utilized herein refers to a monovalent group (e.g., having 1 to 60 carbon atoms) having two or more rings condensed to each other, further including, in addition to carbon atoms, at least one heteroatom, as ring-forming atoms, and having non-aromaticity in its entire molecular structure when considered as a whole. Non-limiting examples of the monovalent non-aromatic condensed heteropolycyclic group are a pyrrolyl group, a thiophenyl group, a furanyl group, an indolyl group, a benzoindolyl group, a naphtho indolyl group, an isoindolyl group, a benzoisoindolyl group, a naphthoisoindolyl group, a benzosilolyl group, a benzothiophenyl group, a benzofuranyl group, a carbazolyl group, a dibenzosilolyl group, a dibenzothiophenyl group, a dibenzofuranyl group, an azacarbazolyl group, an azafluorenyl group, an azadibenzosilolyl group, an azadibenzothiophenyl group, an azadibenzofuranyl group, a pyrazolyl group, an imidazolyl group, a triazolyl group, a tetrazolyl group, an oxazolyl group, an isoxazolyl group, a thiazolyl group, an isothiazolyl group, an oxadiazolyl group, a thiadiazolyl group, a benzopyrazolyl group, a benzimidazolyl group, a benzoxazolyl group, a benzothiazolyl group, a benzoxadiazolyl group, a benzothiadiazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, an imidazotriazinyl group, an imidazopyrazinyl group, an imidazopyridazinyl group, an indenocarbazolyl group, an indolocarbazolyl group, a benzofurocarbazolyl group, a benzothienocarbazolyl group, a benzosilolocarbazolyl group, a benzoindolocarbazolyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a benzonaphthosilolyl group, a benzofurodibenzofuranyl group, a benzofurodibenzothiophenyl group, a benzothienodibenzothiophenyl group, and/or the like. The term “divalent non-aromatic condensed heteropolycyclic group” as utilized herein refers to a divalent group having substantially the same structure as the monovalent non-aromatic condensed heteropolycyclic group.
The term “C6-C60 aryloxy group” as utilized herein refers to —OA102 (wherein A102 is a C6-C60 aryl group), and the term “C6-C60 arylthio group” as utilized herein refers to —SA103 (wherein A103 is a C6-C60 aryl group).
The term “C7-C60 arylalkyl group” as utilized herein refers to -A104A105 (wherein A104 is a C1-C54 alkylene group, and A105 is a C6-C59 aryl group), and the term “C2-C60 heteroarylalkyl group” as utilized herein refers to -A106A107 (wherein A106 is a C1-C59 alkylene group, and A107 is a C1-C59 heteroaryl group).
The term “R10a” as utilized herein may be:
The term “heteroatom” as utilized herein refers to any atom other than a carbon atom. Non-limiting examples of the heteroatom are O, S, N, P, Si, B, Ge, Se, and a (e.g. any suitable) combination thereof.
The term “third-row transition metal” as utilized herein includes Hf, Ta, W, Re, Os, Ir, Pt, Au, and/or the like.
“Ph” as utilized herein refers to a phenyl group, “Me” as utilized herein refers to a methyl group, “Et” as utilized herein refers to an ethyl group, “tert-Bu” or “But” as utilized herein refers to a tert-butyl group, and “OMe” as utilized herein refers to a methoxy group.
The term “biphenyl group” as utilized herein refers to “a phenyl group substituted with a phenyl group.” For example, the “biphenyl group” may be a substituted phenyl group having a C6-C60 aryl group as a substituent.
The term “terphenyl group” as utilized herein refers to “a phenyl group substituted with a biphenyl group.” For example, the “terphenyl group” may be a substituted phenyl group having, as a substituent, a C6-C60 aryl group substituted with a C6-C60 aryl group.
* and *′ as utilized herein, unless defined otherwise, each refer to a binding site to a neighboring atom in a corresponding formula or moiety.
The x-axis, y-axis, and z-axis as utilized herein are not limited to three axes in an orthogonal coordinate system, and may be interpreted in a broad sense including these axes. For example, the x-axis, y-axis, and z-axis may refer to those orthogonal to each other, or may refer to those in different directions that are not orthogonal to each other.
Hereinafter, compounds according to one or more embodiments and light-emitting devices according to one or more embodiments will be described in more detail with reference to Synthesis Examples and Examples. The wording “B was utilized instead of A” utilized in describing Synthesis Examples refers to that an substantially identical molar equivalent of B was utilized in place of A.
Compound 2 according to one or more embodiments may be synthesized according to, for example, Reaction Scheme 1.
2-bromo-9H-carbazole (CAS number=3652-90-2), potassium hydroxide, and 4-toluenesulfonyl chloride (CAS number=98-59-9) were allowed for a reaction, so as to obtain Intermediate 2-1. In relation to Intermediate 2-1, the following M+1 peak value was confirmed by liquid chromatography mass spectrometry (LC-MS).
C19H14BrNO2S: M+1 399.99
Intermediate 2-1 was allowed for a reaction with n-BuLi, and then allowed for a reaction with chlorotriphenylsilane (CAS number=76-86-8), so as to obtain Intermediate 2-2. In relation to Intermediate 2-2, the following M+1 peak value was confirmed by LC-MS.
C37H29NO2SSi: M+1 580.19
Intermediate 2-2 and sodium hydroxide were allowed for a reaction, so as to obtain Intermediate 2-3. In relation to Intermediate 2-3, the following M+1 peak value was confirmed by LC-MS.
C30H23NSi: M+1 426.16
1-bromo-3-fluoro-5-iodobenzene (CAS number=845866-85-5) and (phenyl-d5) boronic acid (CAS number=215527-70-1) were allowed for a reaction in the presence of a Pd catalyst, so as to obtain Intermediate 2-4. In relation to Intermediate 2-4, the following M+1 peak value was confirmed by LC-MS.
C12H3D5BrF: M+1 256.01
Intermediate 2-4 and Intermediate 2-3 were allowed for a reaction in the presence of a Pd catalyst, so as to obtain Intermediate 2-5. In relation to Intermediate 2-5, the following M+1 peak value was confirmed by LC-MS.
C42H25D5FNSi: M+1 601.25
4 g of Intermediate 2-5, 2.4 g of 9H-3,9′-bicarbazole-1,1′,2,2′,3′,4,4′,5,5′,6,6′,7,7′,8,8′-d15 (CAS number=2778147-33-2), 2.9 g of tripotassium phosphate, and 35 mL of dimethylformamide were added to a reaction vessel, and refluxed for 24 hours. After completion of the reaction, an extraction process was performed on the reaction solution by utilizing ethylacetate, and an organic layer collected therefrom was dried by utilizing magnesium sulfate. A residue obtained by evaporating the solvent was separated and purified by silica gel column chromatography, so as to obtain 5.2 g (yield: 84%) of Compound 2. Compound 2 was confirmed by LC-MS and proton nuclear magnetic resonance spectroscopy (1H-NMR).
Compound 4 according to one or more embodiments may be synthesized according to, for example, Reaction Scheme 2.
3-bromo-9H-carbazole-1,2,4,5,6,7,8-d7 (CAS number=2764814-81-3) and (phenyl-d5) boronic acid (CAS number=215527-70-1) were allowed for a reaction in the presence of a Pd catalyst, so as to obtain Intermediate 4-1. In relation to Intermediate 4-1, the following M+1 peak value was confirmed by LC-MS.
C18HD12N: M+1 256.18
Intermediate 4-2 was obtained in substantially the same manner as utilized to synthesize Intermediate 2-4, except that phenylboronic acid (CAS number=98-80-6) was utilized instead of (phenyl-d5) boronic acid (CAS number=215527-70-1). In relation to Intermediate 4-2, the following M+1 peak value was confirmed by LC-MS.
C12H8BrF: M+1 250.99
Intermediate 4-2 and Intermediate 2-3 were allowed for a reaction in the presence of a Pd catalyst, so as to obtain Intermediate 4-3. In relation to Intermediate 4-3, the following M+1 peak value was confirmed by LC-MS.
C42H30FNSi: M+1 596.22
Intermediate 4-3 and 2-bromo-9H-carbazole (CAS number=3652-90-2) were allowed for a reaction, so as to obtain Intermediate 4-4. In relation to Intermediate 4-4, the following M+1 peak value was confirmed by LC-MS. C54H37BrN2Si: M+1 821.20
3.5 g of Intermediate 4-4, 1.1 g of Intermediate 4-1, 0.6 g of sodium tert-butoxide, 0.16 g of tris(dibenzylideneacetone)dipalladium(0), 0.15 mL of tri-tert-butylphosphine, and 20 mL of toluene were added to a reaction vessel, and refluxed for 24 hours. After completion of the reaction, an extraction process was performed on the reaction solution by utilizing ethylacetate, and an organic layer collected therefrom was dried by utilizing magnesium sulfate. A residue obtained by evaporating the solvent was separated and purified by silica gel column chromatography, so as to obtain 3 g (yield: 71%) of Compound 4. Compound 4 was confirmed by LC-MS and 1H-NMR.
Compound 23 according to one or more embodiments may be synthesized according to, for example, Reaction Scheme 3.
Intermediate 2-4 and 9H-carbazole-1,2,3,4,5,6,7,8-d8 (CAS number=38537-24-5) were allowed for a reaction in the presence of a Pd catalyst, so as to obtain Intermediate 23-1. In relation to Intermediate 23-1, the following M+1 peak value was confirmed by LC-MS.
C24H3D13FN: M+1 351.22
Intermediate 23-1 and 3-bromo-9H-carbazole (CAS number=1592-95-6) were allowed for a reaction, so as to obtain Intermediate 23-2. In relation to Intermediate 23-2, the following M+1 peak value was confirmed by LC-MS.
C36H10D13BrN2: M+1 576.18
The same manner as utilized to synthesize Compound 4 was utilized, except that Intermediate 23-2 and Intermediate 2-3 were utilized instead of Intermediate 4-1 and Intermediate 4-4. 5.5 g (yield: 77%) of Compound 23 was obtained. Compound 23 was confirmed by LC-MS and 1H-NMR.
Compound 30 according to one or more embodiments may be synthesized according to, for example, Reaction Scheme 4.
Intermediate 30-1 was obtained in substantially the same manner as utilized to synthesize Intermediate 2-1, except that 3-bromo-9H-carbazole (CAS number=1592-95-6) was utilized instead of 2-bromo-9H-carbazole (CAS number=3652-90-2). In relation to Intermediate 30-1, the following M+1 peak value was confirmed by LC-MS.
C19H14BrNO2S: M+1 399.99
Intermediate 30-2 was obtained in substantially the same manner as utilized to synthesize Intermediate 2-2, except that Intermediate 30-1 was utilized instead of Intermediate 2-1. In relation to Intermediate 30-2, the following M+1 peak value was confirmed by LC-MS.
C37H29NO2SSi: M+1 580.19
Intermediate 30-3 was obtained in substantially the same manner as utilized to synthesize Intermediate 2-3, except that Intermediate 30-2 was utilized instead of Intermediate 2-2. In relation to Intermediate 30-3, the following M+1 peak value was confirmed by LC-MS.
C30H23NSi: M+1 426.16
Intermediate 23-1 and 3-bromo-9H-carbazole-1,2,4,5,6,7,8-d7 (CAS number=2764814-81-3) were allowed for a reaction, so as to obtain Intermediate 30-4. In relation to Intermediate 30-4, the following M+1 peak value was confirmed by LC-MS.
C36H3D20BrN2: M+1 583.23
Substantially the same manner as utilized to synthesize Compound 4 was utilized, except that Intermediate 30-4 and Intermediate 30-3 were utilized instead of Intermediate 4-1 and Intermediate 4-4. 4.6 g (yield: 73%) of Compound 30 was obtained. Compound 30 was confirmed by LC-MS and 1H-NMR.
Compound 43 according to one or more embodiments may be synthesized according to, for example, Reaction Scheme 5.
Intermediate 43-1 was obtained in substantially the same manner as utilized to synthesize Intermediate 2-4, except that (3-(triphenylsilyl)phenyl) boronic acid (CAS number=1253912-58-1) was utilized instead of (phenyl-d5) boronic acid (CAS number=215527-70-1). In relation to Intermediate 43-1, the following M+1 peak value was confirmed by LC-MS.
C30H22BrFSi: M+1 509.09
Intermediate 43-1 and 9H-carbazole (CAS number=86-74-8) were allowed for a reaction in the presence of a Pd catalyst, so as to obtain Intermediate 43-2. In relation to Intermediate 43-2, the following M+1 peak value was confirmed by LC-MS.
C42H30FNSi: M+1 596.22
Intermediate 43-2 and 3-bromo-9H-carbazole-1,2,4,5,6,7,8-d7 (CAS number=2764814-81-3) were allowed for a reaction, so as to obtain Intermediate 43-3. In relation to Intermediate 43-3, the following M+1 peak value was confirmed by LC-MS.
C54H30D7BrN2Si: M+1 828.23
Substantially the same manner as utilized to synthesize Compound 4 was utilized, except that Intermediate 43-3 was utilized instead of Intermediate 4-4. 3.6 g (yield: 75%) of Compound 43 was obtained. Compound 43 was confirmed by LC-MS and 1H-NMR.
Compound 46 according to one or more embodiments may be synthesized according to, for example, Reaction Scheme 6.
Intermediate 46-1 was obtained in substantially the same manner as utilized to synthesize Intermediate 2-4, except that (4-(triphenylsilyl)phenyl)boronic acid (CAS number=852475-03-7) was utilized instead of (phenyl-d5) boronic acid (CAS number=215527-70-1). In relation to Intermediate 46-1, the following M+1 peak value was confirmed by LC-MS.
C30H22BrFSi: M+1 509.09
Intermediate 46-1 and 9H-carbazole-1,2,3,4,5,6,7,8-d8 (CAS number=38537-24-5) were allowed for a reaction in the presence of a Pd catalyst, so as to obtain Intermediate 46-2. In relation to Intermediate 46-2, the following M+1 peak value was confirmed by LC-MS.
C42H22D8FNSi: M+1 604.26
Intermediate 46-2 and 2-bromo-9H-carbazole-1,3,4,5,6,7,8-d7 (CAS number=2650519-97-2) were allowed for a reaction, so as to obtain Intermediate 46-3. In relation to Intermediate 46-3, the following M+1 peak value was confirmed by LC-MS.
C54H22D15BrN2Si: M+1 836.30
Substantially the same manner as utilized to synthesize Compound 4 was utilized, except that Intermediate 46-3 and 9H-carbazole-1,2,3,4,5,6,7,8-d8 (CAS number=38537-24-5) were utilized instead of Intermediate 4-1 and Intermediate 4-4. 3.9 g (yield: 70%) of Compound 46 was obtained. Compound 46 was confirmed by LC-MS and 1H-NMR.
Compound 168 according to one or more embodiments may be synthesized according to, for example, Reaction Scheme 7.
Intermediate 168-1 was obtained in substantially the same manner as utilized to synthesize Intermediate 2-1, except that 2-bromo-9H-carbazole-1,3,4,5,6,7,8-d7 (CAS number=2650519-97-2) was utilized instead of 2-bromo-9H-carbazole (CAS number=3652-90-2). In relation to Intermediate 168-1, the following M+1 peak value was confirmed by LC-MS.
C19H7D7BrNO2S: M+1 407.05
Intermediate 168-2 was obtained in substantially the same manner as utilized to synthesize Intermediate 2-2, except that Intermediate 168-1 was utilized instead of Intermediate 2-1. In relation to Intermediate 168-2, the following M+1 peak value was confirmed by LC-MS.
C37H22D7NO2SSi: M+1 587.22
Intermediate 168-3 was obtained in substantially the same manner as utilized to synthesize Intermediate 2-3, except that Intermediate 168-2 was utilized instead of Intermediate 2-2. In relation to Intermediate 168-3, the following M+1 peak value was confirmed by LC-MS.
C30H16D7NSi: M+1 433.20
Intermediate 4-2 and Intermediate 168-3 were allowed for a reaction in the presence of a Pd catalyst, so as to obtain Intermediate 168-4. In relation to Intermediate 168-4, the following M+1 peak value was confirmed by LC-MS.
C42H23D7FNSi: M+1 603.26
Intermediate 168-4 and 2-bromo-9H-carbazole (CAS number=3652-90-2) were allowed for a reaction, so as to obtain Intermediate 168-5. In relation to Intermediate 168-5, the following M+1 peak value was confirmed by LC-MS. C54H30D7BrN2Si: M+1 828.22
Substantially the same manner as utilized to synthesize Compound 4 was utilized, except that Intermediate 168-5 and 9H-3,9′-bicarbazole (CAS number=18628-07-4) were utilized instead of Intermediate 4-1 and Intermediate 4-4. 4.3 g (yield: 66%) of Compound 168 was obtained. Compound 168 was confirmed by LC-MS and 1H-NMR.
Compound 182 according to one or more embodiments may be synthesized according to, for example, Reaction Scheme 8.
Intermediate 46-1 and 9H-3,9′-bicarbazole-1,1′,2,2′,3′,4,4′,5,5′,6,6′,7,7′,8,8′-d15 (CAS number=2778147-33-2) were allowed for a reaction in the presence of a Pd catalyst, so as to obtain Intermediate 182-1. In relation to Intermediate 182-1, the following M+1 peak value was confirmed by LC-MS.
C54H22D15FN2Si: M+1 776.37
Intermediate 182-1 and 2-bromo-9H-carbazole-1,3,4,5,6,7,8-d7 (CAS number=2650519-97-2) were allowed for a reaction, so as to obtain Intermediate 182-2. In relation to Intermediate 182-2, the following M+1 peak value was confirmed by LC-MS.
C66H22D22BrN3Si: M+1 1008.40
Substantially the same manner as utilized to synthesize Compound 4 was utilized, except that Intermediate 182-2 and 9H-carbazole-1,2,3,4,5,6,7,8-d8 (CAS number=38537-24-5) were utilized instead of Intermediate 4-1 and Intermediate 4-4. 2.9 g (yield: 66%) of Compound 182 was obtained. Compound 182 was confirmed by LC-MS and 1H-NMR.
1H NMR and mass spectroscopy/fast atom bombardment (MS/FAB) of the compounds synthesized according to Synthesis Examples are shown in Table 1. Synthesis methods of compounds other than the compounds synthesized in Synthesis Examples may be easily recognized by those skilled in the art by referring to the synthesis paths and source materials.
1H NMR (CDCl3, 500 MHz)
The HOMO energy level (eV) and the LUMO energy level (eV) of each of Compounds 2, 4, 23, 30, 43, 46, 168, and 182 were evaluated by utilizing the density functional theory (DFT) method of the Gaussian program, which was structure-optimized at the B3LYP/6-31G(d,p) level, and the results are shown in Table 2.
As an anode, a Corning 15 Ω/cm2 (1,200 Å) ITO glass substrate was cut to a size of 50 mm×50 mm×0.5 mm, sonicated with isopropyl alcohol and then pure water each for 5 minutes, and then cleaned by exposure to ultraviolet rays and ozone for 30 minutes. Then, the resultant substrate was mounted on a vacuum deposition apparatus.
After HATCN was vacuum-deposited on the substrate to form (or provide) a hole injection layer having a thickness of 100 Å, BCFN as a first hole transport material was vacuum-deposited thereon to a thickness of 600 Å, and then, SiCzCz as a second hole transport material was vacuum-deposited thereon to a thickness of 50 Å, so as to form (or provide) a hole transport layer.
SiTrzCz2 and Compound 2 as hosts and PtON-TBBI as a phosphorescent dopant were co-deposited at a weight ratio of 60:27:13 on the hole transport layer to form (or provide) an emission layer having a thickness of 350 Å.
Subsequently, mSiTrz was deposited on the emission layer to form (or provide) a first electron transport layer having a thickness of 50 Å, and then, mSiTrz and LiQ were co-deposited thereon at a weight ratio of 1:1 to form (or provide) a second electron transport layer having a thickness of 350 Å, so as to form (or provide) an electron transport layer. LiF, which is a halogenated alkali metal, was deposited on the electron transport layer to form (or provide) an electron injection layer having a thickness of 15 Å, and then, Al was vacuum-deposited thereon to form (or provide) a LiF/Al electrode having a thickness of 80 Å, thereby completing the manufacture of an organic light-emitting device.
Organic light-emitting devices were each manufactured in substantially the same manner as in Example 1, except that, in forming (or providing) an emission layer, Compound 2 as a host was changed as shown in Table 3.
To evaluate characteristics of each of the organic light-emitting devices manufactured according to Examples 1 to 8 and Comparative Examples 1 to 5, the driving voltage at the current density of 10 mA/cm2, and maximum quantum efficiency thereof were measured.
The driving voltage and current density of the organic light-emitting devices were measured by utilizing a source meter (Keithley Instrument, 2400 series), and the maximum quantum efficiency was measured by utilizing the external quantum efficiency measurement device C9920-2-12 of Hamamatsu Photonics Inc.
In evaluating the maximum quantum efficiency, the luminance was measured by utilizing a luminance meter that was calibrated for wavelength sensitivity, and the maximum quantum efficiency was converted by assuming an angular luminance distribution (Lambertian) which introduced a perfect reflecting diffuser.
The evaluation results of the characteristics of each of the organic light-emitting devices are shown in Table 3.
Referring to Table 3, it was confirmed that each of the organic light-emitting devices according to Examples 1 to 8 had a lower driving voltage and superior maximum quantum efficiency than that of the organic light-emitting devices according to Comparative Examples 1 to 5.
According to the one or more embodiments of the present disclosure, by utilizing a heterocyclic compound represented by Formula 1, a light-emitting device having a reduced driving voltage, improved efficiency, and a relatively high-quality electronic apparatus including the light-emitting device may be manufactured.
In the present disclosure, it will be understood that the term “comprise(s),” “include(s),” or “have/has” specifies the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Throughout the present disclosure, when a component such as a layer, a film, a region, or a plate is mentioned to be placed “on” another component, it will be understood that it may be directly on another component or that another component may be interposed therebetween. In some embodiments, “directly on” may refer to that there are no additional layers, films, regions, plates, etc., between a layer, a film, a region, a plate, etc. and the other part. For example, “directly on” may refer to two layers or two members are disposed without utilizing an additional member such as an adhesive member therebetween.
In the present disclosure, although the terms “first,” “second,” etc., may be utilized herein to describe one or more elements, components, regions, and/or layers, these elements, components, regions, and/or layers should not be limited by these terms. These terms are only utilized to distinguish one component from another component.
As utilized herein, the singular forms “a,” “an,” “one,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. Further, the use of “may” when describing embodiments of the present disclosure refers to “one or more embodiments of the present disclosure”.
As utilized herein, the terms “substantially,” “about,” or similar terms are used as terms of approximation and not as terms of degree, and are intended to account for the inherent deviations in measured or calculated values that would be recognized by those of ordinary skill in the art. “About” as used herein, is inclusive of the stated value and means within an acceptable range of deviation for the particular value as determined by one of ordinary skill in the art, considering the measurement in question and the error associated with measurement of the particular quantity (i.e., the limitations of the measurement system). For example, “about” may mean within one or more standard deviations, or within ±30%, 20%, 10%, 5% of the stated value.
Any numerical range recited herein is intended to include all sub-ranges of the same numerical precision subsumed within the recited range. For example, a range of “1.0 to 10.0” is intended to include all subranges between (and including) the recited minimum value of 1.0 and the recited maximum value of 10.0, that is, having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as, for example, 2.4 to 7.6. Any maximum numerical limitation recited herein is intended to include all lower numerical limitations subsumed therein and any minimum numerical limitation recited in the present disclosure is intended to include all higher numerical limitations subsumed therein. Accordingly, Applicant reserves the right to amend the disclosure, including the claims, to expressly recite any sub-range subsumed within the ranges expressly recited herein.
The light-emitting device, the light-emitting apparatus, the display device, the electronic apparatus, the electronic device, or any other relevant devices or components according to embodiments of the present disclosure described herein may be implemented utilizing any suitable hardware, firmware (e.g., an application-specific integrated circuit), software, or a combination of software, firmware, and hardware. For example, the various components of the device may be formed on one integrated circuit (IC) chip or on separate IC chips. Further, the various components of the device may be implemented on a flexible printed circuit film, a tape carrier package (TCP), a printed circuit board (PCB), or formed on one substrate. Further, the various components of the device may be a process or thread, running on one or more processors, in one or more computing devices, executing computer program instructions and interacting with other system components for performing the various functionalities described herein. The computer program instructions are stored in a memory which may be implemented in a computing device using a standard memory device, such as, for example, a random access memory (RAM). The computer program instructions may also be stored in other non-transitory computer readable media such as, for example, a CD-ROM, flash drive, or the like. Also, a person of skill in the art should recognize that the functionality of various computing devices may be combined or integrated into a single computing device, or the functionality of a particular computing device may be distributed across one or more other computing devices without departing from the scope of the embodiments of the present disclosure.
It should be understood that embodiments described herein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should typically be considered as available for other similar features or aspects in one or more embodiments. While one or more embodiments have been described with reference to the drawings, it will be understood by those of ordinary skill in the art that one or more suitable changes in form and details may be made therein without departing from the spirit and scope as defined by the appended claims and equivalents thereof.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2023-0180101 | Dec 2023 | KR | national |
