Patent Application
20190312215
Korean Patent Application No. 10-2018-0041650 filed on Apr. 10, 2018, in the Korean Intellectual Property Office on, and entitled: “Composition and Organic Optoelectronic Device and Display Device,” is incorporated by reference herein in its entirety.
Embodiments relate to a composition, an organic optoelectronic device, and a display device.
An organic optoelectronic device may be used to convert electrical energy into photo energy or vice versa.
An organic optoelectronic device may be classified as follows in accordance with its driving principles. One is a photoelectric device where excitons are generated by photo energy, separated into electrons and holes, and are transferred to different electrodes to generate electrical energy. Another is a light emitting device where a voltage or a current is supplied to an electrode to generate photo energy from electrical energy.
Examples of the organic optoelectronic diode may be an organic photoelectric device, an organic light emitting diode, an organic solar cell, and an organic photo conductor drum.
Embodiments are directed to a composition includes a first compound, the first compound being represented by a combination of Chemical Formula 1 and Chemical Formula 2 bonded together, and a second compound, the second compound being represented by Chemical Formula 3,
In Chemical Formula 1 and Chemical Formula 2,
Ar may be a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof,
adjacent two of a1* to a4* are linked with b1* and b2*, respectively, and remaining two of a1* to a4* not linking with b1* and b2* may each independently be C-La-Ra,
La and L1 to L4 may each independently be a single bond, a substituted or unsubstituted C6 to C20 arylene group, a substituted or unsubstituted divalent C2 to C20 heterocyclic group, or a combination thereof,
Ra and R1 to R4 may each independently be hydrogen, deuterium, a cyano group, a substituted or unsubstituted amine group, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof. At least one of Ra and R1 to R4 may be a group represented by Chemical Formula A:
In Chemical Formula A,
Rb and Rc may each independently be a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof, and
* is a linking point with La and L1 to L4;
In Chemical Formula 3,
Z1 to Z3 may each independently be N or CRd, wherein Rd is hydrogen, deuterium, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heterocyclic group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a halogen, a cyano group, or a combination thereof. At least two of Z1 to Z3 may be N,
L5 to L7 may each independently be a single bond, a substituted or unsubstituted C6 to C20 arylene group, a substituted or unsubstituted divalent C2 to C20 heterocyclic group, or a combination thereof,
R5 to R7 may each independently be a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof. At least one of R5 to R7 may be a group represented by Chemical Formula B:
In Chemical Formula B,
X may be O or S,
Re to Rh may each independently be hydrogen, deuterium, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, halogen, a cyano group, or a combination thereof,
Re and Rf may each be separate or may be bonded with each other to form a ring,
Rg and Rh may each be separate or may be bonded with each other to form a ring, and
* is a linking point with one of L5 to L7.
Embodiments are also directed to an organic optoelectronic device, including an anode and a cathode facing each other, and at least one organic layer disposed between the anode and the cathode. The organic layer may include a composition according to an embodiment.
Embodiments are also directed to a display device, includes an organic optoelectronic device according to an embodiment.
Features will become apparent to those of skill in the art by describing in detail example embodiments with reference to the attached drawings in which:
Example embodiments will now be described more fully hereinafter with reference to the accompanying drawings; however, they may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey example implementations to those skilled in the art. In the drawing figures, the dimensions of layers and regions may be exaggerated for clarity of illustration. Like reference numerals refer to like elements throughout.
As used herein, when a definition is not otherwise provided, “substituted” refers to replacement of at least one hydrogen of a substituent or a compound by deuterium, a halogen, a hydroxyl group, an amino group, a substituted or unsubstituted C1 to C30 amine group, a nitro group, a substituted or unsubstituted C1 to C40 silyl group, a C1 to C30 alkyl group, a C1 to C10 alkylsilyl group, a C6 to C30 arylsilyl group, a C3 to C30 cycloalkyl group, a C3 to C30 heterocycloalkyl group, a C6 to C30 aryl group, a C2 to C30 heteroaryl group, a C1 to C20 alkoxy group, a C1 to C10 trifluoroalkyl group, a cyano group, or a combination thereof.
In one example of the present disclosure, the “substituted” refers to replacement of at least one hydrogen of a substituent or a compound by deuterium, a C1 to C30 alkyl group, a C1 to C10 alkylsilyl group, a C6 to C30 arylsilyl group, a C3 to C30 cycloalkyl group, a C3 to C30 heterocycloalkyl group, a C6 to C30 aryl group, or a C2 to C30 heteroaryl group. In one example of the present disclosure, the “substituted” refers to replacement of at least one hydrogen of a substituent or a compound by deuterium, a C1 to C30 alkyl group, a C1 to C10 alkylsilyl group, a C6 to C30 arylsilyl group, a C3 to C30 cycloalkyl group, a C3 to C30 heterocycloalkyl group, a C6 to C30 aryl group, or a C2 to C30 heteroaryl group. In addition, in specific examples of the present disclosure, the “substituted” refers to replacement of at least one hydrogen of a substituent or a compound by deuterium, a C1 to C5 alkyl group, a C6 to C18 aryl group, a pyridinyl group, a quinolinyl group, an isoquinolinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, or a carbazolyl group. In addition, in specific examples of the present disclosure, the “substituted” refers to replacement of at least one hydrogen of a substituent or a compound by deuterium, a C1 to C5 alkyl group, a C6 to C18 aryl group, a dibenzofuranyl group, or a dibenzothiophenyl group. In addition, in specific examples of the present disclosure, the “substituted” refers to replacement of at least one hydrogen of a substituent or a compound by deuterium, a methyl group, an ethyl group, a propyl group, a butyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a triphenyl group, a dibenzofuranyl group, or a dibenzothiophenyl group.
As used herein, when a definition is not otherwise provided, “hetero” refers to one including one to three heteroatoms selected from N, O, S, P, and Si, and remaining carbons in one functional group.
As used herein, “aryl group” refers to a group including at least one hydrocarbon aromatic moiety, and all the elements of the hydrocarbon aromatic moiety have p-orbitals which form conjugation, for example a phenyl group, a naphthyl group, and the like, two or more hydrocarbon aromatic moieties may be linked by a sigma bond and may be, for example a biphenyl group, a terphenyl group, a quarterphenyl group, and the like, and two or more hydrocarbon aromatic moieties are fused directly or indirectly to provide a non-aromatic fused ring, for example a fluorenyl group.
The aryl group may include a monocyclic, polycyclic or fused ring polycyclic (i.e., rings sharing adjacent pairs of carbon atoms) functional group.
As used herein, “heterocyclic group” is a generic concept of a heteroaryl group, and may include at least one hetero atom selected from N, O, S, P, and Si instead of carbon (C) in a cyclic compound such as aryl group, a cycloalkyl group, a fused ring thereof, or a combination thereof. When the heterocyclic group is a fused ring, the entire ring or each ring of the heterocyclic group may include one or more heteroatoms.
For example, “heteroaryl group” may refer to an aryl group including at least one hetero atom selected from N, O, S, P, and Si instead of carbon (C). Two or more heteroaryl groups are linked by a sigma bond directly, or when the C2 to C60 heteroaryl group includes two or more rings, the two or more rings may be fused. When the heteroaryl group is a fused ring, each ring may include 1 to 3 hetero atoms.
Specific examples of the heterocyclic group may be a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, and the like.
More specifically, the substituted or unsubstituted C6 to C30 aryl group and/or the substituted or unsubstituted C2 to C30 heterocyclic group may be a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted anthracenyl group, a substituted or unsubstituted phenanthrenyl group, a substituted or unsubstituted naphthacenyl group, a substituted or unsubstituted pyrenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted p-terphenyl group, a substituted or unsubstituted m-terphenyl group, a substituted or unsubstituted o-terphenyl group, a substituted or unsubstituted chrysenyl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted perylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted indenyl group, a substituted or unsubstituted furanyl group, a substituted or unsubstituted thiophenyl group, a substituted or unsubstituted pyrrolyl group, a substituted or unsubstituted pyrazolyl group, a substituted or unsubstituted imidazolyl group, a substituted or unsubstituted triazolyl group, a substituted or unsubstituted oxazolyl group, a substituted or unsubstituted thiazolyl group, a substituted or unsubstituted oxadiazolyl group, a substituted or unsubstituted thiadiazolyl group, a substituted or unsubstituted pyridyl group, a substituted or unsubstituted pyrimidinyl group, a substituted or unsubstituted pyrazinyl group, a substituted or unsubstituted triazinyl group, a substituted or unsubstituted benzofuranyl group, a substituted or unsubstituted benzothiophenyl group, a substituted or unsubstituted benzimidazolyl group, a substituted or unsubstituted indolyl group, a substituted or unsubstituted quinolinyl group, a substituted or unsubstituted isoquinolinyl group, a substituted or unsubstituted quinazolinyl group, a substituted or unsubstituted quinoxalinyl group, a substituted or unsubstituted naphthyridinyl group, a substituted or unsubstituted benzoxazinyl group, a substituted or unsubstituted benzthiazinyl group, a substituted or unsubstituted acridinyl group, a substituted or unsubstituted phenazinyl group, a substituted or unsubstituted phenothiazinyl group, a substituted or unsubstituted phenoxazinyl group, a substituted or unsubstituted dibenzofuranyl group, or a substituted or unsubstituted dibenzothiophenyl group, or a combination thereof.
In the present specification, hole characteristics refer to an ability to donate an electron to form a hole when an electric field is applied, and that a hole formed in the anode may be easily injected into a light emitting layer, and a hole formed in a light emitting layer may be easily transported into an anode and transported in the light emitting layer due to conductive characteristics according to a highest occupied molecular orbital (HOMO) level.
In addition, electron characteristics refer to an ability to accept an electron when an electric field is applied, and that an electron formed in a cathode may be easily injected into a light emitting layer, and an electron formed in a light emitting layer may be easily transported into a cathode and transported in the light emitting layer due to conductive characteristics according to a lowest unoccupied molecular orbital (LUMO) level.
Hereinafter, a composition for an organic optoelectronic device according to an example embodiment is described.
A composition for an organic optoelectronic device according to an example embodiment includes a first compound and a second compound. In an example embodiment, the first compound may have hole characteristics and the second compound may have electron characteristics.
According to an example embodiment, the first compound is represented by a combination of Chemical Formula 1 and Chemical Formula 2 bonded together:
In Chemical Formula 1 and Chemical Formula 2,
Ar may be a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof,
adjacent two of a1* to a4* may be linked with b1* and b2*, respectively, and remaining two of a1* to a4* not linking with b1* and b2* may each independently be C-La-Ra,
La and L1 to L4 may each independently be a single bond, a substituted or unsubstituted C6 to C20 arylene group, a substituted or unsubstituted divalent C2 to C20 heterocyclic group, or a combination thereof,
Ra and R1 to R4 may each independently be hydrogen, deuterium, a cyano group, a substituted or unsubstituted amine group, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof, and
at least one of Ra and R1 to R4 may be a group represented by Chemical Formula A:
In Chemical Formula A,
Rb and Rc may each independently be a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof, and
* is a linking point with La and L1 to L4.
Without being bound by theory, it is believed that, the first compound has a structure where benzocarbazole is substituted with amine, a HOMO electron cloud is expanded from amine into benzocarbazole and thus hole injection and transport characteristics may be improved due to high HOMO energy. In addition, since the benzocarbazole has relatively high HOMO energy compared with bicarbazole and indolocarbazole, a device having a low driving voltage may be realized due to the structure where benzocarbazole is substituted with amine. In addition, bicarbazole and the indolocarbazole may not be desirable as a red host due to high T1 energy, but the structure where benzocarbazole is substituted with amine has a desirable T1 energy as a red host. Accordingly, a device including the first compound may realize high efficiency/long life-span characteristics. Further, it may be included with the second compound to exhibit good interface characteristics and hole and electron transport capability and thus may lower a driving voltage of a device.
In an example embodiment, Rb and Rc may independently be a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted anthracenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthrenyl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzofuranyl group, or a substituted or unsubstituted dibenzothiophenyl group.
In an example embodiment, Rb and Rc may independently be a substituted or unsubstituted, phenyl group, a substituted or unsubstituted p-biphenyl group, or a substituted or unsubstituted fluorenyl group, wherein the substituent may be a phenyl group, a naphthyl group, an anthracenyl group, a phenanthrenyl group, a triphenylenyl group, a carbazolyl group, a dibenzofuranyl group, or a dibenzothiophenyl group.
In an example embodiment, Ar may independently be a substituted or unsubstituted C6 to C20 aryl group or a substituted or unsubstituted C2 to C20 heterocyclic group.
In an example embodiment, Ar may be a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted anthracenyl group, a substituted or unsubstituted phenanthrenyl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted carbazolyl group, or a combination thereof.
In an example embodiment, Ar may be a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, or a substituted or unsubstituted carbazolyl group.
In an example embodiment, La and L1 to L4 may independently be a single bond or a substituted or unsubstituted C6 to C20 arylene group.
In an example embodiment, L1 and L1 to L4 may independently be a single bond, a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenylene group, a substituted or unsubstituted terphenylene group, or a substituted or unsubstituted naphthylene group.
In an example embodiment, La and L1 to L4 may independently be a single bond, a substituted or unsubstituted m-phenylene group, a substituted or unsubstituted p-phenylene group, a substituted or unsubstituted o-phenylene group, a substituted or unsubstituted m-biphenylene group, a substituted or unsubstituted p-biphenylene group, a substituted or unsubstituted o-biphenylene group, a substituted or unsubstituted m-terphenylene group, a substituted or unsubstituted p-terphenylene group, or a substituted or unsubstituted o-terphenylene group. Herein, the “substituted” may for example refer to replacement of at least one hydrogen by deuterium, a C1 to C20 alkyl group, a C6 to C20 aryl group, a halogen, a cyano group, or a combination thereof.
In an example embodiment, Ra and R1 to R4 may independently be hydrogen, deuterium, a cyano group, a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C6 to C20 aryl group, a substituted or unsubstituted C2 to C20 heterocyclic group, or the group represented by Chemical Formula A.
In an example embodiment, Ra and R1 to R4 may independently be hydrogen or the group represented by Chemical Formula A.
In an example embodiment, the first compound may for example be represented by one of Chemical Formula 1A to Chemical Formula 1C according to a fusion position of Chemical Formula 1 and Chemical Formula 2.
In Chemical Formula 1A to Chemical Formula 1C, Ar, La and L1 to L4, and Ra and R1 to R4 are the same as described above.
In an example embodiment, Chemical Formula 1A may be represented by one of Chemical Formula 1A-1 to Chemical Formula 1A-3 according to a substitution position of the group represented by Chemical Formula A.
In Chemical Formula 1A-I to Chemical Formula 1A-3, Ar, La, L1 to L4, Ra, R1 to R4, Rb, and Rc are the same as described above.
In an example embodiment, Chemical Formula 1A-1 may be represented by one of Chemical Formula 1A-1-a to Chemical Formula 1A-1-d according to a specific substitution position of the group represented by Chemical Formula A.
In Chemical Formula 1A-1-a to Chemical Formula 1A-1-d, Ar, La, L1 to L4, Ra, R1 to R4, Rb, and Rc are the same as described above.
In an example embodiment, Chemical Formula 1A-1 may be represented by Chemical Formula 1A-1-b or Chemical Formula 1A-1-c.
In an example embodiment, Chemical Formula 1A-2 may be represented by Chemical Formula 1A-2-a or Chemical Formula 1A-2-b according to a specific substitution position of the group represented by Chemical Formula A.
In Chemical Formula 1A-2-a and Chemical Formula 1A-2-b, Ar, La and L1 to L4, and R1 to R4 and Rb and Rc are the same as described above.
In an example embodiment, Chemical Formula 1A-2 may be represented by Chemical Formula 1A-2-a.
In an example embodiment, Chemical Formula 1A-3 may be represented by one of Chemical Formula 1A-3-a to Chemical Formula 1A-3-d according to a specific substitution position of the group represented by Chemical Formula A.
In Chemical Formula 1A-3-a to Chemical Formula 1A-3-d, Ar, La, L1 to L4, Ra, R1 to R4, Rb, and Rc are the same as described above.
In an example embodiment, Chemical Formula 1A-3 may be represented by Chemical Formula 1A-3-b or Chemical Formula 1A-3-c.
In an example embodiment, Chemical Formula 1B may be represented by one of Chemical Formula 1B-1 to Chemical Formula 1B-3 according to a substitution position of the group represented by Chemical Formula A.
In Chemical Formula 1B-1 to Chemical Formula 1B-3, Ar, La, L1 to L4, Ra, R1 to R4, Rb, and Rc are the same as described above.
In an example embodiment, Chemical Formula 1B-1 may be represented by one of Chemical Formula 1B-1-a to Chemical Formula 1B-1-d according to a specific substitution position of the group represented by Chemical Formula A.
In Chemical Formula 1B-1-a to Chemical Formula 1B-1-d, Ar, La, L1 to L4, Ra, R1 to R4, Rb, and Rc are the same as described above.
In an example embodiment, Chemical Formula B-2 may be represented by Chemical Formula 1B-2-a or Chemical Formula 1B-2-b according to a specific substitution position of the group represented by Chemical Formula A.
In Chemical Formula 1B-2-a and Chemical Formula 1B-2-b, Ar, La, L1 to L4, R1 to R4, Rb, and Rc are the same as described above.
In an example embodiment, Chemical Formula 1B-3 may be represented by one of Chemical Formula 1B-3-a to Chemical Formula 1B-3-d according to a specific substitution position of the group represented by Chemical Formula A.
In Chemical Formula 1B-3-a to Chemical Formula 1B-3-d, Ar, La, L1 to L4, Ra, R1 to R4, Rb, and Rc are the same as described above.
In an example embodiment, Chemical Formula 1B-3 may be represented by Chemical Formula 1B-3-b.
In an example embodiment, Chemical Formula 1C may be represented by one of Formula 1C-1 to Chemical Formula 1C-3 according to a substitution position of the group represented by Chemical Formula A.
In Chemical Formula 1C-1 to Chemical Formula 1C-3, Ar, La, L1 to L4, Ra, R1 to R4, Rb, and Rc are the same as described above.
In an example embodiment, Chemical Formula 1C-1 may be represented by one of Chemical Formula 1C-1-a to Chemical Formula 1C-1-d according to a specific substitution position of the group represented by Chemical Formula A.
In Chemical Formula 1C-1-a to Chemical Formula 1C-1-d, Ar, La, L1 to L4, Ra, R1 to R4, Rb, and Rc are the same as described above.
In an example embodiment, Chemical Formula 1C-1 may be represented by Chemical Formula 1C-1-b.
In an example embodiment, above Chemical Formula 1C-2 may be represented by Chemical Formula 1C-2-a or Chemical Formula 1C-2-b according to a specific substitution position of the group represented by Chemical Formula A.
In Chemical Formula 1C-2-a and Chemical Formula 1C-2-b, Ar, La, L1 to L4, R1 to R4, Rb, and R are the same as described above.
In an example embodiment, Chemical Formula 1C-3 may be represented by one of Chemical Formula 1C-3-a to Chemical Formula 1C-3-d according to a specific substitution position of the group represented by Chemical Formula A.
In Chemical Formula 1C-3-a to Chemical Formula 1C-3-d, Ar, La, L1 to L4, Ra, R1 to R4, Rb, and Rc are the same as described above.
In an example embodiment, Chemical Formula 1C-3 may be represented by Chemical Formula 1C-3-b.
In an example embodiment, the first compound may be represented by Chemical Formula 1A, for example Chemical Formula 1A-1, for example Chemical Formula 1A-1-b.
The first compound may be, for example, one of the compounds of Group 1:
In an example embodiment, the second compound is represented by Chemical Formula 3.
The second compound may be a compound having electron characteristics and may exhibit bipolar characteristics with the first compound.
In Chemical Formula 3,
Z1 to Z3 may each independently be N or CRd, wherein Rd is hydrogen, deuterium, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heterocyclic group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a halogen, a cyano group, or a combination thereof. In an implementation, at least two of Z1 to Z3 may be N.
L5 to L7 may each independently be a single bond, a substituted or unsubstituted C6 to C20 arylene group, a substituted or unsubstituted divalent C2 to C20 heterocyclic group, or a combination thereof,
R5 to R7 may each independently be a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof. In an implementation, at least one of R5 to R7 is a group represented by Chemical Formula B:
In Chemical Formula B.
X may be O or S,
Rc to Rh may each independently be hydrogen, deuterium, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a halogen, a cyano group, or a combination thereof,
Re and Rf may each independently be present or may be bonded with each other to form a ring,
Rg and Rh may each independently be present or may be bonded with each other to form a ring, and
* is a linking point with one of L5 to L7.
Without being bound by theory, the second compound may accept an electron when an electric field is applied, that is, it is a compound having electron characteristics, and has a structure where at least one of a fused ring represented by Chemical Formula B is bound to a nitrogen-containing ring, which is a pyrimidine or triazine ring, and thus may exhibit good interface characteristics and hole and electron transport capability along with the first compound and may lower a driving voltage of an organic optoelectronic device.
In an example embodiment, two of Z1 to Z3 may be nitrogen (N) and the remaining one may be CRd.
In an example embodiment, Z1 and Z2 may be nitrogen and Z3 may be CRd.
In an example embodiment, Z2 and Z3 may be nitrogen and Z1 may be CRd.
In an example embodiment, Z1 and Z3 may be nitrogen and Z2 may be CRd.
In an example embodiment, Z1 to Z3 may independently be nitrogen (N).
In an example embodiment, L5 to L7 may independently be a single bond or a substituted or unsubstituted C6 to C20 arylene group.
In an example embodiment, L5 to L7 may independently be a single bond, a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenylene group, a substituted or unsubstituted terphenylene group, or a substituted or unsubstituted naphthylene group.
In an example embodiment, L5 to L7 may independently be a single bond, a substituted or unsubstituted m-phenylene group, a substituted or unsubstituted p-phenylene group, a substituted or unsubstituted o-phenylene group, a substituted or unsubstituted m-biphenylene group, a substituted or unsubstituted p-biphenylene group, a substituted or unsubstituted o-biphenylene group, a substituted or unsubstituted m-terphenylene group, a substituted or unsubstituted p-terphenylene group, or a substituted or unsubstituted o-terphenylene group. Herein, the “substituted” may for example refer to replacement of at least one hydrogen by deuterium, a C1 to C20 alkyl group, a C6 to C20 aryl group, a halogen, a cyano group, or a combination thereof.
In an example embodiment, R5 to R7 may each independently be a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted quaterphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted anthracenyl group, a substituted or unsubstituted phenanthrenyl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted pyridinyl group, a substituted or unsubstituted pyrimidinyl group, a substituted or unsubstituted triazinyl group, or the group represented by Chemical Formula B.
In an example embodiment, the group represented by Chemical Formula B may be represented by one of Chemical Formula B-1 to Chemical Formula B-4 according to a bonding position.
In Chemical Formula B-1 to Chemical Formula B-4, X and Re to Rh are the same as described above.
In an example embodiment, the group represented by Chemical Formula B may be represented by Chemical Formula B-1 or Chemical Formula B-2.
The second compound may be for example represented by one of Chemical Formula 2A to Chemical Formula 2C according to the number of the group represented by Chemical Formula B.
In Chemical Formulae 2A to 2C, Z1 to Z3, L5 to L7, R6 and R7 are the same as described above,
X1 to X3 may each independently be O or S, and
Re1 to Re3, Rf1 to Rf3, Rg1 to Rg3, and Rh1 to Rh3 may each independently be hydrogen, deuterium, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heterocyclic group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a halogen, a cyano group, or a combination thereof.
In an example embodiment, in Chemical Formula 2B, X1 and X2 may be the same or different.
In an example embodiment, in Chemical Formula 2B, X1 and X2 may be the same and X1 and X2 may independently be O.
In an example embodiment, in Chemical Formula 2B, X1 and X2 may be the same and X1 and X2 may independently be S.
In an example embodiment, in Chemical Formula 2B, X1 and X2 may be different and X1 may be S and X2 may be O or X1 may be O and X2 may be S.
In an example embodiment, in Chemical Formula 2C, X1 to X3 may be the same or different.
In an example embodiment, in Chemical Formula 2C, X1 to X3 may be the same and X1 to X3 may independently be O.
In an example embodiment, in Chemical Formula 2C, X1 to X3 may be the same and X1 to X3 may independently be S.
In an example embodiment, in Chemical Formula 2C, one of X1 to X3 may be different and two of X1 to X3 may be S and one of X1 to X3 may be O or two of X1 to X3 may be O and one of X1 to X3 may be S.
In an example embodiment, the second compound may be represented by Chemical Formula 2B.
In an example embodiment, in Chemical Formula 2B, L5 and L6 may independently be a single bond.
In an example embodiment, Chemical Formula 2B may be represented by Chemical Formula 2B-1.
In Chemical Formula 2B-1,
Z1 to Z3, R7, L5 to L7, Re1 to Re3, Rf1 to Rf3, Rg1 to Rg3, and Rh1 to Rh3 are the same as described above.
Without being bound by theory, it is believed that the second compound represented by Chemical Formula 2B-1 has an effectively expanded LUMO energy band and larger planarity of a molecular structure, thereby the second compound may become a structure capable of accepting electrons when an electric field is applied, and accordingly an organic optoelectronic device including the second compound may exhibit a lowered driving voltage. Such a LUMO expansion and ring fusion may increase stability of electrons of the pyrimidine or triazine rings, and life-span of a device including the second compound may be further effectively improved.
In an example embodiment, in Chemical Formula 2B-1, X1 and X2 may independently be O.
The second compound may be, for example, one of compounds of Group 2.
The first compound and the second compound may be included in a weight ratio of, for example, about 1:99 to about 99:1. Within the range, a desirable weight ratio may be adjusted using a hole transport capability of the first compound and an electron transport capability of the second compound to realize bipolar characteristics and thus to improve efficiency and life-span. Within the range, they may be for example included in a weight ratio of about 10:90 to 90:10, about 20:80 to 80:20, about 30:70 to 70:30, about 40:60 to 60:40, or about 50:50. For example, they may be included in a weight ratio of about 50:50 to 60:40, for example, about 50:50 or about 60:40.
In an example embodiment, a composition according to an example embodiment includes a compound represented by Chemical Formula 1A-1-b as the first compound and a compound represented by Chemical Formula 2A or Chemical Formula 2B as the second compound.
In an example embodiment, in Chemical Formula 1A-1-b, Ar may be a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted anthracenyl group, a substituted or unsubstituted phenanthrenyl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted carbazolyl group, or a combination thereof, La and L1 to L4 may independently be a single bond, a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenylene group, a substituted or unsubstituted terphenylene group, or a substituted or unsubstituted naphthylene group, Ra, R1, R2, and R4 may independently be hydrogen, deuterium, a cyano group, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof, and Rb and Rc may independently be a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted anthracenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthrenyl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzofuranyl group, or a substituted or unsubstituted dibenzothiophenyl group, and
in Chemical Formula 2A and Chemical Formula 2B, Z1 to Z3 may independently be N or CRd, at least two of Z1 to Z3 are N, L5 to L7 may independently be a single bond, a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenylene group, a substituted or unsubstituted terphenylene group, or a substituted or unsubstituted naphthylene group, R6 and R7 may independently be a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted quaterphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted anthracenyl group, a substituted or unsubstituted phenanthrenyl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted pyridinyl group, a substituted or unsubstituted pyrimidinyl group, a substituted or unsubstituted triazinyl group, a substituted or unsubstituted dibenzofuranyl group, or a substituted or unsubstituted dibenzothiophenyl group, X1 and X2 may independently be O or S, and Rd, Re1, Re2, Rf1, Rf2, Rg1, Rg2, Rh1, and Rh2 may each independently be hydrogen, deuterium, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a halogen, a cyano group, or a combination thereof.
In an example embodiment, Chemical Formula 2B may be represented by Chemical Formula 2B-1.
In an example embodiment, the composition may further include at least one other compound in addition to the first compound and the second compound.
In an example embodiment, the composition may further include a dopant. The dopant may be for example a phosphorescent dopant, for example a red, green, or blue phosphorescent dopant, for example a red phosphorescent dopant.
The dopant is a material mixed in a small amount with the first compound and the second compound to cause light emission. The dopant may be a material such as a metal complex that emits light by multiple excitations into a triplet or more. The dopant may be, for example an inorganic, organic, or organic/inorganic compound, and one or more kinds thereof may be used.
Examples of the dopant may be a phosphorescent dopant and examples of the phosphorescent dopant may be an organic metal compound including Ir, Pt, Os, Ti, Zr, Hf, Eu, Tb, Tm, Fe, Co, Ni, Ru, Rh, Pd, or a combination thereof. The phosphorescent dopant may be, for example a compound represented by Chemical Formula Z.
L8MX4 [Chemical Formula Z]
In Chemical Formula Z, M is a metal, and L8 and X4 may be the same or different, and are a ligand to form a complex compound with M.
The M may be for example Ir, Pt, Os, Ti, Zr, Hf, Eu, Tb, Tm, Fe, Co, Ni, Ru, Rh, Pd, or a combination thereof, and the L8 and X4 may be, for example a bidendate ligand.
The composition may be applied by, for example, a dry film formation method such as chemical vapor deposition (CVD).
Hereinafter, an organic optoelectronic device including the composition is described.
An organic optoelectronic device according to an example embodiment may be a device to convert electrical energy into photo energy or vice versa, and may be, for example, an organic photoelectric device, an organic light emitting diode, an organic solar cell, an organic photo conductor drum, etc.
Herein, an organic light emitting diode as one example of an organic optoelectronic device is described referring to drawings.
Referring to
The anode 120 may be made of a conductor having a large work function to help hole injection, and may be for example a metal, a metal oxide and/or a conductive polymer. The anode 120 may be, for example a metal such as nickel, platinum, vanadium, chromium, copper, zinc, gold, and the like or an alloy thereof; metal oxide such as zinc oxide, indium oxide, indium tin oxide (ITO), indium zinc oxide (IZO), and the like; a combination of metal and oxide such as ZnO and Al or SnO2 and Sb; a conductive polymer such as poly(3-methylthiophene), poly(3,4-(ethylene-1,2-dioxy)thiophene) (PEDOT), polypyrrole, and polyaniline.
The cathode 110 may be made of a conductor having a small work function to help electron injection, and may be for example a metal, a metal oxide and/or a conductive polymer. The cathode 110 may be for example a metal such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin, lead, cesium, barium, and the like or an alloy thereof; a multi-layer structure material such as LiF/Al, LiO2/Al, LiF/Ca, LiF/Al and BaF2/Ca.
The organic layer 105 may include a light emitting layer 130 including the composition.
The composition may be for example a red light emitting composition.
The light emitting layer 130 may include, for example the first compound and the second compound as a phosphorescent host.
Referring to
The hole auxiliary layer 140 may include, for example, at least one compound of Group D, below.
For example, the hole auxiliary layer 140 may include a hole transport layer between the anode 120 and the light emitting layer 130 and a hole transport auxiliary layer between the light emitting layer 130 and the hole transport layer, and at least one compound of Group D may be included in the hole transport auxiliary layer.
In the hole transport auxiliary layer, known compounds disclosed in U.S. Pat. No. 5,061,569 B2, which is incorporated by reference herein in its entirety for all purposes, JP1993-009471A, WO1995-009147A1, JP1995-126615A, JP1998-095973A, and the like and compounds similar thereto may be used in addition to the compound.
In an embodiment, in
The organic light emitting diodes 100 and 200 may be manufactured by forming an anode or a cathode on a substrate, forming an organic layer using a dry film formation method such as a vacuum deposition method (evaporation), sputtering, plasma plating, and ion plating, and forming a cathode or an anode thereon.
The organic light emitting diode may be applied to an organic light emitting display device.
The following Examples and Comparative Examples are provided in order to highlight characteristics of one or more embodiments, but it will be understood that the Examples and Comparative Examples are not to be construed as limiting the scope of the embodiments, nor are the Comparative Examples to be construed as being outside the scope of the embodiments. Further, it will be understood that the embodiments are not limited to the particular details described in the Examples and Comparative Examples.
(Preparation of First Compound)
Phenylhydrazine hydrochloride (70.0 g, 484.1 mmol) and 7-bromo-3,4-dihydro-2H-naphthalen-1-one (108.9 g, 484.1 mmol) were put in a round-bottomed flask and then dissolved in ethanol (1200 ml). 60 mL of hydrochloric acid was slowly added in a dropwise fashion thereto at room temperature, and the obtained mixture was stirred at 90° C. for 12 hours. When a reaction was complete, the solvent was removed therefrom under a reduced pressure, and an extract was obtained therefrom by using an excess amount of EA. After removing the organic solvent under a reduced pressure, the extract was stirred in a small amount of methanol and then filtered to obtain 95.2 g of Intermediate A-2-1 (66%).
Intermediate A-2-1 (95.2 g, 319.3 mmol) and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (108.7 g, 478.9 mmol) were put in a round-bottomed flask and dissolved in 600 ml of toluene. The solution was stirred at 80° C. for 12 hours. When a reaction was complete, a reaction solvent was removed, and the rest thereof was treated through column chromatography to obtain 41.3 g of Intermediate A-2-2 (44%).
Intermediate A-2-2 (41.3 g, 139.0 mmol), iodobenzene (199.2 g, 976.0 mmol), CuI (5.31 g, 28.0 mmol), K2CO3 (28.9 g, 209.0 mmol), and 1,10-phenanthroline (5.03 g, 28.0 mmol) were put in a round-bottomed flask and dissolved in 500 ml of DMF. The solution was stirred at 180° C. for 12 hours. When a reaction was complete, the reaction solvent was removed therefrom under a reduced pressure, and then a product therefrom was dissolved in dichloromethane and silica gel-filtered. After concentrating dichloromethane, the product was recrystallized with hexane to obtain 39.0 g of Intermediate A-2-3 (75%).
Intermediate A-2-3 (23.2 g, 62.5 mmol), bis-biphenyl-4-yl-amine (21.1 g, 65.6 mmol), sodium t-butoxide (NaOtBu) (9.0 g, 93.8 mmol), Pd2(dba)3 (3.4 g, 3.7 mmol), and tri t-butylphosphine (P(tBu)3) (4.5 g, 50% in toluene) were put in xylene (300 mL) and then heated and refluxed under a nitrogen flow for 12 hours. After removing the xylene, 200 mL of methanol was added thereto to crystallize a solid, the solid was filtered, dissolved in toluene, and filtered again with silica gel/Celite, and then the organic solvent in an appropriate amount was concentrated to obtain 29 g of Compound A-2 (76%).
LC/MS calculated for: C46H32N2 Exact Mass: 612.26 found for 612.32 [M+H].
Intermediate A-3-1 was synthesized according to the same method as the a) of Synthesis Example 1 by respectively using phenylhydrazinehydrochloride and 6-bromo-3,4-dihydro-2H-naphthalen-1-one by 1.0 equivalent.
Intermediate A-3-2 was synthesized according to the same method as the b) of Synthesis Example 1 by using Intermediate A-3-1 and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone in an equivalent ratio of 1:1.5.
Intermediate A-3-3 was synthesized according to the same method as the c) of Synthesis Example 1 by using Intermediate A-3-2 and iodobenzene in an equivalent ratio of 1:3.
Compound A-3 was synthesized according to the same method as the d) of Synthesis Example 1 by using Intermediate A-3-3 and bis-biphenyl-4-yl-amine in an equivalent ratio of 1:1.
LC/MS calculated for: C46H32N2 Exact Mass: 612.26 found for 612.28 [M+H].
Intermediate A-5-1 was synthesized according to the same method as the a) of Synthesis Example 1 by respectively using phenylhydrazinehydrochloride and 3,4-dihydro-2H-naphthalen-1-one by 1.0 equivalent.
Intermediate A-5-2 was synthesized according to the same method as the b) of Synthesis Example 1 by respectively using Intermediate A-5-1 and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone in an equivalent ratio of 1:1.5.
Intermediate A-5-3 was synthesized according to the same method as the c) of Synthesis Example 1 by using Intermediate A-5-2 and iodobenzene in an equivalent ratio of 1:3.
Intermediate A-5-3 (23.6 g, 80.6 mmol) was put in a round-bottomed flask and then dissolved in 300 mL of dichloromethane. Subsequently, N-bromosuccinimide (NBS) (14.1 g, 79.0 mmol) was dissolved in 100 mL of DMF, the solution was slowly added to the above solution in a dropwise fashion, and the mixed solution was stirred at room temperature for 2 hours. When a reaction was complete, the reaction solvent was removed, and a product therefrom was treated through column chromatography to obtain 25 g of Intermediate A-5-4 (83%).
Compound A-5 was synthesized according to the same method as the d) of Synthesis Example 1 by using Intermediate A-5-4 and bis-biphenyl-4-yl-amine in an equivalent ratio of 1:1.
LC/MS calculated for: C46H32N2 Exact Mass: 612.26 found for 612.33 [M+H].
Intermediate A-7-1 was synthesized according to the same method as the a) of Synthesis Example 1 by respectively using 4-bromophenylhydrazinehydrochloride and 3,4-dihydro-2H-naphthalen-1-one by 1.0 equivalent.
Intermediate A-7-2 was synthesized according to the same method as the b) of Synthesis Example 1 by using Intermediate A-7-1 and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone in an equivalent ratio of 1:1.5.
Intermediate A-7-3 was synthesized according to the same method as the c) of Synthesis Example 1 by using Intermediate A-7-2 and iodobenzene in an equivalent ratio of 1:3.
Compound A-7 was synthesized according to the same method as the d) of Synthesis Example 1 by using Intermediate A-7-3 and bis-biphenyl-4-yl-amine in an equivalent ratio of 1:1.
LC/MS calculated for: C46H32N2 Exact Mass: 612.26 found for 612.30 [M+H].
Intermediate A-8-1 was synthesized according to the same method as the a) of Synthesis Example 1 by respectively using 3-bromophenylhydrazinehydrochloride and 3,4-dihydro-2H-naphthalen-1-one by 1.0 equivalent.
Intermediate A-8-2 was synthesized according to the same method as the b) of Synthesis Example 1 by using Intermediate A-8-1 and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone in an equivalent ratio of 1:1.5.
Intermediate A-8-3 was synthesized according to the same method as the c) of Synthesis Example 1 by using Intermediate A-8-2 and iodobenzene in an equivalent ratio of 1:3.
Compound A-8 was synthesized according to the same method as the d) of Synthesis Example 1 by using Intermediate A-8-3 and bis-biphenyl-4-yl-amine in an equivalent ratio of 1:1.
LC/MS calculated for: C46H32N2 Exact Mass: 612.26 found for 612.33 [M+H].
4-bromo-phenylamine (50.0 g, 290.7 mmol), 2-naphthalene boronic Acid (59.9 g, 171.9 mmol), K2CO3 (80.4 g, 581.3 mmol), and Pd(PPh3)4 (10.1 g, 8.7 mmol) were put in a round-bottomed flask and dissolved in 800 ml of toluene and 400 ml of distilled water, and the solution was stirred at 80° C. for 12 hours. When a reaction was complete, an aqueous layer was removed therefrom, and the rest thereof was treated through column chromatography to obtain 40.0 g of Intermediate A-11-1 (63%).
Intermediate A-11-1 (17.7 g, 80.8 mmol), 4-bromo-biphenyl (18.8 g, 80.8 mmol), sodium t-butoxide (NaOtBu) (11.6 g, 121.1 mmol), Pd2(dba)3 (4.4 g, 4.8 mmol), and tri t-butylphosphine (P(tBu)3) (5.9 g, 50% in toluene) were added to xylene (400 mL) and then heated and refluxed together under a nitrogen flow for 12 hours. After removing the xylene, the rest thereof was treated through column chromatography to obtain 20.0 g of Intermediate A-11-2 (67%).
Compound A-11 was synthesized according to the same method as the d) of Synthesis Example 1 by using Intermediate A-11-2 and Intermediate A-2-3 in an equivalent ratio of 1:1.
LC/MS calculated for: C50H34N2 Exact Mass: 662.27 found for 662.31 [M+H].
Compound A-12 was synthesized according to the same method as the d) of Synthesis Example 1 by using Intermediate A-3-3 and Intermediate A-11-2 in an equivalent ratio of 1:1.
LC/MS calculated for: C50H34N2 Exact Mass: 662.27 found for 662.30 [M+H].
Aniline (8.3 g, 89.5 mmol), 4-(4-bromo-phenyl)-dibenzofuran (23.1 g, 71.5 mmol), sodium t-butoxide (NaOtBu) (12.9 g, 134.2 mmol), Pd2(dba)3 (4.9 g, 5.4 mmol), and tri t-butylphosphine (P(tBu)3) (6.5 g, 50% in toluene) were added to xylene (400 mL) and then heated and refluxes together under a nitrogen flow for 12 hours. After removing the xylene, the rest thereof was treated through column chromatography to obtain 20.0 g of Intermediate A-29-1 (67%).
Compound A-29 was synthesized according to the same method as the d) of Synthesis Example 1 by using Intermediate A-29-1 and Intermediate A-2-3 in an equivalent ratio of 1:1.
LC/MS calculated for: C46H30N2O Exact Mass: 626.24 found for 626.28 [M+H].
9,9-Dimethyl-9H-fluoren-2-ylamine (17.4 g, 83.0 mmol), 4-bromo-biphenyl (15.5 g, 66.4 mmol), sodium t-butoxide (NaOtBu) (12.0 g, 124.5 mmol), Pd2(dba)3 (4.6 g, 5.0 mmol), and tri t-butylphosphine (P(tBu)3) (6.0 g, 50% in toluene) were put in xylene (400 mL) and then heated and refluxed under a nitrogen flow for 12 hours. After removing the xylene, the rest thereof was treated through column chromatography to obtain 18.0 g of Intermediate A-38-1 (60%).
Compound A-38 was synthesized according to the same method as the d) of Synthesis Example 1 by using Intermediate A-38-1 and Intermediate A-3-3 in an equivalent ratio of 1:1.
LC/MS calculated for: C49H36N2 Exact Mass: 652.29 found for 652.33 [M+H].
Intermediate A-3-3 (30.0 g, 80.6 mmol), 4-chlorophenyl boronic acid (15.1 g, 96.7 mmol), K2CO3 (22.3 g, 161.2 mmol), and Pd(PPh3)4 (2.8 g, 2.4 mmol) were put in a round-bottomed flask and then dissolved in 200 ml of tetrahydrofuran and 100 ml of distilled water, and the solution was stirred at 80° C. for 12 hours. When a reaction was complete, an aqueous layer was removed, and the rest thereof was treated through column chromatography to obtain 27.0 g of Intermediate A-51-1 (83%).
Compound A-51 was synthesized according to the same method as the d) of Synthesis Example 1 by using Intermediate A-51-1 and bis-biphenyl-4-yl-amine in an equivalent ratio of 1:1.
LC/MS calculated for: C52H36N2 Exact Mass: 688.29 found for 688.34 [M+H].
1,4-dibromo-2-nitro-benzene (30.0 g, 106.8 mmol), 2-naphthalene boronic acid (18.4 g, 106.8 mmol), K2CO3 (29.5 g, 213.6 mmol), and Pd(PPh3)4 (3.7 g, 3.2 mmol) were put in a round-bottomed flask and then dissolved in 300 mL of tetrahydrofuran and 150 mL of distilled water, and the solution was stirred at 80° C. for 12 hours. When a reaction was complete, an aqueous layer was removed, and the rest thereof was treated through column chromatography to obtain 27.0 g of Intermediate A-65-1 (77%).
Intermediate A-65-1 (27.0 g, 82.3 mmol) and triphenylphosphine (86.3 g, 329.1 mmol) were put in a round-bottomed flask and then dissolved in 300 mL of 1,2-dichlorobenzene, and the solution was stirred at 180° C. for 12 hours. When a reaction was complete, a solvent was removed therefrom, and the rest thereof was treated through column chromatography to obtain 18.0 g of Intermediate A-65-2 (74%).
Intermediate A-65-3 was synthesized according to the same method as the c) of Synthesis Example 1 by using Intermediate A-65-2 and iodobenzene in an equivalent ratio of 1:3.
Intermediate A-65 was synthesized according to the same method as the d) of Synthesis Example 1 by using Intermediate A-65-3 and bis-biphenyl-4-yl-amine in an equivalent ratio of 1:1.
LC/MS calculated for: C46H32N2 Exact Mass: 612.26 found for 612.30 [M+H].
Intermediate A-72-1 was synthesized according to the same method as the a) of Synthesis Example 1 by using phenylhydrazinehydrochloride and 6-bromo-3,4-dihydro-1H-naphthalen-2-one by 1.0 equivalent.
Intermediate A-72-2 was synthesized according to the same method as the b) of Synthesis Example 1 by using Intermediate A-72-1 and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone in an equivalent ratio of 1:1.5.
Intermediate A-72-3 was synthesized according to the same method as the c) of Synthesis Example 1 by using Intermediate A-72-2 and iodobenzene in an equivalent ratio of 1:3.
Intermediate A-72 was synthesized according to the same method as the d) of Synthesis Example 1 by using Intermediate A-72-3 and bis-biphenyl-4-yl-amine in an equivalent ratio of 1:1.
LC/MS calculated for: C46H32N2 Exact Mass: 612.26 found for 612.31 [M+H].
Intermediate A-77-1 was synthesized according to the same method as the a) of Synthesis Example 11 by using 1,4-dibromo-2-nitro-benzene and 1-naphthalene boronic acid by 1.0 equivalent.
Intermediate A-77-2 was synthesized according to the same method as the b) of Synthesis Example 11 by using Intermediate A-77-1 and triphenylphosphine in an equivalent ratio of 1:4.
Intermediate A-77-3 was synthesized according to the same method as the c) of Synthesis Example 1 by using Intermediate A-77-2 and iodobenzene in an equivalent ratio of 1:3.
Compound A-77 was synthesized according to the same method as the d) of Synthesis Example 1 by using Intermediate A-77-3 and bis-biphenyl-4-yl-amine in an equivalent ratio of 1:1.
LC/MS calculated for: C46H32N2 Exact Mass: 612.26 found for 612.29 [M+H].
The compound, biphenylcarbazolyl bromide (12.33 g, 30.95 mmol) was dissolved in 200 mL of toluene in an nitrogen atmosphere, biphenylcarbazolylboronic acid (12.37 g, 34.05 mmol) and tetrakis(triphenylphosphine)palladium (1.07 g, 0.93 mmol) are added thereto, and the obtained mixture was stirred. Subsequently, potassium carbonate saturated in water (12.83 g, 92.86 mmol) was added thereto, and the obtained mixture was heated and refluxed at 90° C. for 12 hours. When a reaction was complete, water was added to the reaction solution, and an extract was obtained by using dichloromethane (DCM), filtered after removing moisture therefrom by using anhydrous MgSO4, and concentrated under a reduced pressure. A residue obtained therefrom was separated and purified through flash column chromatography to obtain Compound V-1 (18.7 g, 92%).
LC/MS calculated for: C48H32N2 Exact Mass: 636.26 found for 636.30 [M+H].
8 g (31.2 mmol) of Intermediate V-2-1 (5,8-dihydro-indolo[2,3-C]carbazole), 20.5 g (73.32 mmol) of 4-iodobiphenyl, 1.19 g (6.24 mmol) of CuI, 1.12 g (6.24 mmol) of 1,10-phenanthroline, and 12.9 g (93.6 mmol) of K2CO3 were put in a round-bottomed flask, 50 ml of DMF was added thereto to dissolve them, and the solution was refluxed and stirred under a nitrogen atmosphere for 24 hours. When a reaction was complete, distilled water was added thereto, and a precipitate therefrom was filtered. The solid was dissolved in 250 ml of xylene, filtered with silica gel, and precipitated into a white solid to obtain 16.2 g of Compound V-2 (a yield of 93%).
LC/MS calculated for: C42H28N2 Exact Mass: 560.23 found for 560.27 [M+H].
(Preparation of Second Compound)
15 g (81.34 mmol) of cyanuric chloride was dissolved in 200 mL of anhydrous tetrahydrofuran in a 500 mL round-bottomed flask, 1 equivalent of a 3-biphenyl magnesium bromide solution (0.5 M tetrahydrofuran) was added thereto in a dropwise fashion at 0° C. under a nitrogen atmosphere, and the mixture was slowly heated up to room temperature. Subsequently, the reaction solution was stirred at the room temperature for 1 hour and then poured into 500 mL of ice water to separate layers. An organic layer was separated therefrom and then treated with anhydrous magnesium sulfate and concentrated. The concentrated residue was recrystallized with tetrahydrofuran and methanol to obtain 17.2 g of Intermediate B-1-1.
17.2 g (56.9 mmol) of Intermediate B-1-1 was added to 200 mL of tetrahydrofuran and 100 mL of distilled water in a 500 mL round-bottomed flask, 2 equivalent of dibenzofuran-3-boronic acid (CAS: 395087-89-5), 0.03 equivalent of tetrakistriphenylphosphine palladium, and 2 equivalent of potassium carbonate were added thereto, and the mixture was heated and refluxed under a nitrogen atmosphere. After 18 hours, the reaction solution was cooled down, and a solid precipitated therein was filtered and washed with 500 mL of water. The solid was recrystallized with 500 mL of monochlorobenzene to obtain 12.87 g of Compound B-1.
LC/MS calculated for: C39H23N3O2 Exact Mass: 565.1790 found for: 566.18 [M+H].
Magnesium (7.86 g, 323 mmol) and iodine (1.64 g, 6.46 mmol) were added to 0.1 L of tetrahydrofuran (THF) in a nitrogen atmosphere, the mixture was stirred for 30 minutes, 1-bromo-3,5-diphenylbenzene (100 g, 323 mmol) dissolved in 0.3 L of THF was slowly added thereto in a dropwise fashion at 0° C. over 30 minutes. This obtained mixed solution was slowly added in a dropwise fashion to 64.5 g (350 mmol) of cyanuric chloride dissolved in 0.5 L of THF at 0° C. over 30 minutes. When a reaction was complete, water was added to the reaction solution, and an extract was obtained by using dichloromethane (DCM), filtered after removing moisture therefrom with anhydrous MgSO4, and concentrated under a reduced pressure. The obtained residue was separated and purified through flash column chromatography to obtain Intermediate B-3-1 (79.4 g, 65%).
Compound B-3 was synthesized according to the same method as the b) of Synthesis Example 14 by using Intermediate B-3-1.
LC/MS calculated for: C45H27N3O2 Exact Mass: 641.2103 found for 642.21 [M+H].
22.6 g (100 mmol) of 2,4-dichloro-6-phenyltriazine was added to 100 mL of tetrahydrofuran, 100 mL of toluene, and 100 mL of distilled water in a 500 mL round-bottomed flask, 0.9 equivalent of dibenzofuran-3-boronic acid (CAS No.: 395087-89-5), 0.03 equivalent of tetrakistriphenylphosphine palladium, and 2 equivalent of potassium carbonate were added thereto, and the mixture was heated and refluxed under a nitrogen atmosphere. After 6 hours, the reaction solution was cooled down, an aqueous layer was removed therefrom, and an organic layer therein was dried under a reduced pressure. A solid obtained therefrom was washed with water and hexane and recrystallized with 200 mL of toluene to obtain 21.4 g of Intermediate B-17-1 (60% of a yield).
Intermediate B-17-1 (56.9 mmol) was added to 200 mL of tetrahydrofuran and 100 mL of distilled water in a 500 mL round-bottomed flask, 1.1 equivalent of 3,5-diphenylbenzeneboronic acid (CAS No.: 128388-54-5), 0.03 equivalent of tetrakistriphenylphosphine palladium, and 2 equivalent of potassium carbonate were added thereto, and the mixture was heated and refluxed under a nitrogen atmosphere. After 18 hours, the reaction solution was cooled down, and a solid precipitated therein was filtered and washed with 500 mL of water. The solid was recrystallized with 500 mL of monochlorobenzene to obtain Compound B-17.
LC/MS calculated for: C39H25N3O Exact Mass: 555.1998 found for 556.21 [M+H].
Compound B-20 was synthesized according to the same method as the b) of Synthesis Example 16 by using Intermediate B-17-1 and 1.1 equivalent of (5′-phenyl[1,1′:3′,1″-terphenyl]-4-yl)-boronic acid (CAS No.: 491612-72-7).
LC/MS calculated for: C45H29N3O Exact Mass: 627.2311 found for 628.24 [M+H].
15 g (81.34 mmol) of cyanuric chloride is dissolved in 200 mL of anhydrous tetrahydrofuran in a 500 mL round-bottomed flask, 1 equivalent of a 4-biphenyl magnesium bromide solution (0.5 M tetrahydrofuran) was added thereto in a dropwise fashion at 0° C. under a nitrogen atmosphere, and the mixture was slowly heated up to room temperature. The reaction solution was stirred at the room temperature for 1 hour and then poured into 500 mL of ice water to separate layers. An organic layer was separated, treated with anhydrous magnesium sulfate, and concentrated. The concentrated residue was recrystallized with tetrahydrofuran and methanol to obtain 17.2 g of Intermediate B-23-1.
Intermediate B-23-2 was synthesized according to the same method as the a) of Synthesis Example 16 by using Intermediate B-23-1.
Compound B-23 was synthesized according to the same method as the b) of Synthesis Example 16 by using Intermediate B-23-2 and 1.1 equivalent of 3,5-diphenylbenzeneboronic acid.
LC/MS calculated for: C45H29N3O Exact Mass: 627.2311 found for 628.24 [M+H].
Compound B-24 was synthesized according to the same method as the b) of Synthesis Example 16 by using Intermediate B-23-2 and 1.1 equivalent of B-[1,1′:4′,1″-terphenyl]-3-yl boronic acid.
LC/MS calculated for: C45H29N3O Exact Mass: 627.2311 found for 628.24 [M+H].
14.06 g (56.90 mmol) of 3-bromo-dibenzofuran, 200 mL of tetrahydrofuran, and 100 mL of distilled water were put in a 500 mL round-bottomed flask, 1 equivalent of 3′-chloro-phenylboronic acid, 0.03 equivalent of tetrakistriphenylphosphine palladium, and 2 equivalent of potassium carbonate were added thereto, and the mixture was heated and refluxed under a nitrogen atmosphere. After 18 hours, the reaction solution was cooled down, and a solid precipitated therein was filtered and washed with 500 mL of water. The solid was recrystallized with 500 mL of monochlorobenzene to obtain 12.05 g of Intermediate B-71-1. (A yield of 76%)
24.53 g (88.02 mmol) of Intermediate B-71-1 was added to 250 mL of DMF in a 500 mL round-bottomed flask, 0.05 equivalent of dichlorodiphenylphosphinoferrocene palladium, 1.2 equivalent of bispinacolato diboron, and 2 equivalent of potassium acetate were added thereto, and the mixture was heated and refluxed under a nitrogen atmosphere for 18 hours. The reaction solution was cooled down and then added to 1 L of water in a dropwise fashion to obtain a solid. The solid was dissolved in boiling toluene, treated with activated carbon, and filtered with silica gel, and the filtrate was concentrated. The concentrated solid was stirred with a small amount of hexane and filtered to obtain 22.81 g of Intermediate B-71-2. (A yield of 70%)
Compound B-71 was synthesized according to the same method as the b) of Synthesis Example 16 by using Intermediate B-71-2 and 2,4-bis([1,1′-biphenyl]-4-yl)-6-chloro-1,3,5-triazine respectively by 1.0 equivalent.
LC/MS calculated for: C45H29N3O Exact Mass: 627.2311 found for 628.25 [M+H].
Intermediate B-124-1 was synthesized according to the same method as a) of Synthesis Example 16 by using 1-bromo-3-chloro-5-phenylbenzene and biphenyl-4-boronic acid respectively by 1.1 equivalent. Herein, a product therefrom was not recrystallized but purified through flash column by using hexane.
30 g (88.02 mmol) of Intermediate B-124-1 was added to 250 mL of DMF in a 500 mL round-bottomed flask, 0.05 equivalent of dichlorodiphenylphosphinoferrocene palladium, 1.2 equivalent of bispinacolato diboron, and 2 equivalent of potassium acetate were added thereto, and the mixture was heated and refluxed under a nitrogen atmosphere for 18 hours. The reaction solution was cooled down and then added to 1 L of water in a dropwise fashion to obtain a solid. The solid was dissolved in boiling toluene, treated with activated carbon, and filtered with silica gel, and the filtrate was concentrated. The concentrated solid was stirred with a small amount of hexane and filtered to obtain 28.5 g of Intermediate B-124-2 (70% of a yield).
Compound B-124 was synthesized according to the same method as b) of Synthesis Example 16 by using Intermediate B-124-2 and Intermediate B-17-1 respectively by 1.0 equivalent.
LC/MS calculated for: C45H29N3O Exact Mass: 627.2311 found for 628.22 [M+H].
Intermediate B-129-1 was synthesized according to the same method as the a) of Synthesis Example 20 by using 1-bromo-4-chloro-benzene and 3-dibenzofuranylboronic acid respectively by 1.0 equivalent.
Intermediate B-129-2 was synthesized according to the same method as the b) of Synthesis Example 20 by using Intermediate B-129-1 and bispinacolato diboron in an equivalent ratio of 1:1.2.
Compound B-129 was synthesized according to the same method as the b) of Synthesis Example 16 by using Intermediate B-129-2 and 2-chloro-4-(biphenyl-4-yl)6-phenyl-1,3,5-triazine respectively by 1.0 equivalent.
LC/MS calculated for: C39H25N3O Exact Mass: 551.20 found for 551.24 [M+H].
Compound B-131 was synthesized according to the same method as the b) of Synthesis Example 16 by using Intermediate B-23-2 and Intermediate B-135-2 respectively by 1.0 equivalent.
LC/MS calculated for: C43H27N3O Exact Mass: 601.22 found for 601.26 [M+H].
Compound B-133 was synthesized according to the same method as the b) of Synthesis Example 16 by using Intermediate B-17-1 and Intermediate B-129-2 respectively by 1.0 equivalent.
LC/MS calculated for: C39H23N3O2 Exact Mass: 565.18 found for 565.22 [M+H].
Intermediate B-135-1 was synthesized according to the same method as the a) of Synthesis Example 20 by using 1-bromo-4-chloro-benzene and 2-naphthalene boronic acid respectively by 1.0 equivalent.
Intermediate B-135-2 was synthesized according to the same method as the b) of Synthesis Example 20 by using Intermediate B-135-1 and bispinacolato diboron in an equivalent ratio of 1:1.2.
Compound B-135 was synthesized according to the same method as the b) of Synthesis Example 16 by using Intermediate B-135-2 and Intermediate B-17-1 respectively by 1.0 equivalent.
LC/MS calculated for: C37H23N3O Exact Mass: 525.18 found for 525.22 [M+H].
1-bromo-4-chloro-2-fluorobenzene (61 g, 291 mmol), 2,6-dimethoxyphenylboronic acid (50.4 g, 277 mmol), K2CO3 (60.4 g, 437 mmol) and Pd(PPh3)4 (10.1 g, 8.7 mmol) were put in a round-bottomed flask and then dissolved in 500 ml of THF and 200 ml of distilled water, and the solution was refluxed and stirred at 60° C. for 12 hours. When a reaction was complete, an aqueous layer was removed, and the rest thereof was treated through column chromatography (hexane: DCM 20%) to obtain 38 g of Intermediate 1 (51%).
Intermediate 1 (38 g, 142 mmol) and pyridine hydrochloride (165 g, 1425 mmol) were put in a round-bottomed flask and then refluxed and stirred at 200° C. for 24 hours. When a reaction was complete, the resultant is cooled down to room temperature and then slowly poured into distilled water, and the mixture was stirred for 1 hour. A solid therein was filtered to obtain 23 g of Intermediate 2 (68%).
Intermediate 2 (23 g, 96 mmol) and K2CO3 (20 g, 144 mmol) were put in a round-bottomed flask and dissolved in 100 ml of NMP, and the solution was refluxed and stirred at 180° C. for 12 hours. When a reaction was complete, the mixture was poured into an excess amount of distilled water. A solid therein was filtered, dissolved in ethylacetate, and then dried with MgSO4, and an organic layer was removed therefrom under a reduced pressure. Subsequently, column chromatography (hexane: EA 30%) was used to obtain 16 g of Intermediate 3 (76%).
Intermediate 3 (16 g, 73 mmol) and pyridine (12 ml, 146 mmol) were put in a round-bottomed flask and dissolved in 200 ml of DCM. The solution was cooled down to 0° C., and trifluoromethanesulfonic anhydride (14.7 ml, 88 mmol) was slowly added thereto in a dropwise fashion. The mixture was stirred for 6 hour, and when a reaction was complete, an excess amount of distilled water was added thereto, and the obtained mixture was stirred for 30 minutes and extracted with DCM. Subsequently, an organic solvent was removed under a reduced pressure, and the rest thereof was vacuum-dried to obtain 22.5 g of Intermediate 4 (88%).
14.4 g of Intermediate 5 (81%) was synthesized according to the same method as Synthesis Example 1 by using Intermediate 4 (22.5 g, 64 mmol), phenylboronic acid (7.8 g, 64 mmol), K2CO3 (13.3 g, 96 mmol), and Pd(PPh3)4 (3.7 g, 3.2 mmol).
Intermediate 5 (22.5 g, 80 mmol), bis(pinacolato)diboron (24.6 g, 97 mmol), Pd(dppf)Cl2 (2 g, 2.4 mmol), tricyclohexylphosphine (3.9 g, 16 mmol), and potassium acetate (16 g, 161 mmol) were put in a round-bottomed flask and dissolved in 320 ml of DMF. The mixture was refluxed and stirred at 120° C. for 10 hours. When a reaction was complete, the mixture was poured into an excess amount of distilled water, and the obtained mixture was stirred for one hour. A solid therein was filtered and dissolved in DCM. MgSO4 was used to remove moisture therefrom, and an organic solvent was filtered by using a silica gel pad and removed under a reduced pressure. A solid was recrystallized with EA and hexane to obtain 26.9 g of Intermediate 6 (90%).
15.5 g of Compound D-25 (70%) was synthesized according to the same method as the b) of Synthesis Example 16 by using Intermediate B-23-2 (15 g, 35 mmol), Intermediate 6 (12.8 g, 35 mmol), K2CO3 (7.2 g, 52 mmol), and Pd(PPh3)4 (2 g, 1.7 mmol) under a nitrogen condition in a round-bottomed flask.
LC/MS calculated for: C45H27N3O2 Exact Mass: 641.21 found for 641.25 [M+H].
Intermediate D-3-1 was synthesized according to the same method as the a) of Synthesis Example 26 by using 2-bromo-1-chloro-3-fluoro-benzene and 2-hydroxyphenylboronic acid respectively by 1.0 equivalent.
Intermediate D-3-2 was synthesized according to the same method as the c) of Synthesis Example 26 by using Intermediate D-3-1 and K2CO3 in an equivalent ratio of 1:1.5.
Intermediate D-3-3 was synthesized according to the same method as the f) of Synthesis Example 26 by using Intermediate D-3-2 and bis(pinacolato)diboron in an equivalent ratio of 1:1.2.
Compound D-3 was synthesized according to the same method as the b) of Synthesis Example 16 by using Intermediate D-3-3 and 2,4-bis([1,1′-biphenyl]-4-yl)-6-chloro-1,3,5-triazine respectively by 1.0 equivalent.
LC/MS calculated for: C39H25N3O Exact Mass: 551.20 found for 551.24 [M+H].
(Manufacture of Organic Light Emitting Diode)
A glass substrate coated with ITO (indium tin oxide) as a 1500 Å-thick thin film was washed with distilled water. After washing with the distilled water, the glass substrate was ultrasonic wave-washed with a solvent such as isopropyl alcohol, acetone, methanol, and the like and dried and then moved to a plasma cleaner, cleaned by using oxygen plasma for 10 minutes, and moved to a vacuum depositor. This obtained ITO transparent electrode was used as an anode, Compound A was vacuum-deposited on the ITO substrate to form a 700 Å-thick hole injection layer, Compound B was deposited to be 50 Å thick on the injection layer, and Compound C was deposited to be 1020 Å thick to form a hole transport layer. On the hole transport layer, a 400 Å-thick hole transport auxiliary layer was formed by depositing Compound C-1. On the hole transport auxiliary layer, a 400 Å-thick light emitting layer was formed by vacuum-depositing Compounds A-2 and B-3 as a host simultaneously and 2 wt % of [Ir(piq)2acac] as a dopant. Herein Compound A-2 and Compound B-3 were used in a weight ratio of 5:5, and their ratio in the following Examples was separately provided. Subsequently, on the light emitting layer, a 300 Å-thick electron transport layer was formed by simultaneously vacuum-depositing the compound D and Liq in a ratio of 1:1, and on the electron transport layer, Liq and Al were sequentially vacuum-deposited to be 15 Å thick and 1200 Å thick, manufacturing an organic light emitting diode.
The organic light emitting diode had a five-layered organic thin layer, and specifically the following structure.
ITO/Compound A (700 Å)/Compound B (50 Å)/Compound C (700 Å)/Compound C-1 (400 Å)/EML[Compound A-2: B-3: [Ir(piq)2acac] (2 wt %)] (400 Å)/Compound D: Liq (300 Å)/Liq (15 Å)/Al (1200 Å).
Compound A: N4,N4′-diphenyl-N4,N4′-bis(9-phenyl-9H-carbazol-3-yl)biphenyl-4,4′-diamine
Compound B: 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile (HAT-CN)
Compound C: N-(biphenyl-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluoren-2-amine
Compound C-1: N,N-di([1,1′-biphenyl]-4-yl)-7,7-dimethyl-7H-fluoreno[4,3-b]benzofuran-10-amine
Compound D: 8-(4-(4,6-di(naphthalen-2-yl)-1,3,5-triazin-2-yl)phenyl)quinoline
Each organic light emitting diode was manufactured according to the same method as Example 1 except for changing compositions as shown in Table 1.
Each organic light emitting diode was manufactured according to the same method as Example 1 except for changing compositions as shown in Table 1.
Evaluation
Power efficiency of the organic light emitting diodes according to Examples 1 to 14 and Comparative Examples 1 and 2 were evaluated.
Specific measurement methods are as follows, and the results are shown in Table 1.
(1) Measurement of Current Density Change Depending on Voltage Change
The obtained organic light emitting diodes were measured regarding a current value flowing in the unit device, while increasing the voltage from 0 V to 10 V using a current-voltage meter (Keithley 2400), and the measured current value was divided by area to provide the results.
(2) Measurement of Luminance Change Depending on Voltage Change
Luminance was measured by using a luminance meter (Minolta Cs-1000A), while the voltages of the organic light emitting diodes were increased from 0 V to 10 V.
(3) Measurement of Power Efficiency
Power efficiency (cd/A) at the same current density (10 mA/cm2) were calculated by using the luminance, current density, and voltages (V) from the items (1) and (2).
(4) Measurement of Life-Span
The results were obtained by measuring a time when current efficiency (cd/A) was decreased down to 97%, while luminance (cd/m2) was maintained to be 9000 cd/m2.
(5) Measurement of Driving Voltage
A driving voltage of each diode was measured using a current-voltage meter (Keithley 2400) at 15 mA/cm2.
Referring to Table 1, organic light emitting diodes according to Examples 1 to 14 exhibited remarkably improved driving voltage, efficiency, and life-span compared with those of Comparative Examples 1 and 2.
By way of summation and review, an organic light emitting diode (OLED) has recently drawn attention due to an increase in demand for flat panel displays. The organic light emitting diode converts electrical energy into light by applying current to an organic light emitting material. Performance of an organic light emitting diode may be affected by organic materials disposed between electrodes.
As described above, embodiments may provide a composition for an organic optoelectronic device capable of realizing an organic optoelectronic device having high efficiency and a long life-span.
Example embodiments have been disclosed herein, and although specific terms are employed, they are used and are to be interpreted in a generic and descriptive sense only and not for purpose of limitation. In some instances, as would be apparent to one of ordinary skill in the art as of the filing of the present application, features, characteristics, and/or elements described in connection with a particular embodiment may be used singly or in combination with features, characteristics, and/or elements described in connection with other embodiments unless otherwise specifically indicated. Accordingly, it will be understood by those of skill in the art that various changes in form and details may be made without departing from the spirit and scope of the present invention as set forth in the following claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2018-0041650 | Apr 2018 | KR | national |
