Organic light-emitting device

Description

CROSS-REFERENCE TO RELATED APPLICATION

Korean Patent Application No. 10-2015-0118281, filed on Aug. 21, 2015, in the Korean Intellectual Property Office, and entitled: “Organic Light-Emitting Device,” is incorporated by reference herein in its entirety.

BACKGROUND

1. Field

Embodiments relate to an organic light-emitting device.

2. Description of the Related Art

Organic light-emitting devices (OLEDs) are self-emission devices that have wide viewing angles, high contrast ratios, quick response times, high luminance, and excellent driving voltage and response speed characteristics, and can produce full-color images.

SUMMARY

Embodiments are directed to an organic light-emitting device, including a first electrode; a second electrode facing the first electrode; an emission layer disposed between the first electrode and the second electrode; and a hole transport region disposed between the first electrode and the emission layer, wherein, the hole transport region includes a first compound represented by Formula 1 and a second compound represented by Formula 2, and the first compound and the second compound are different from each other:

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wherein, in Formulae 1 and 2,

X₁and X₁₁are each independently selected from N, B, and P,

Y₁is selected from N(R₃), O, and S,

L₁to L₃and L₁₁to L₁₄are each independently selected from a substituted or unsubstituted C₃-C₁₀cycloalkylene group, a substituted or unsubstituted C₁-C₁₀heterocycloalkylene group, a substituted or unsubstituted C₃-C₁₀cycloalkenylene group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenylene group, a substituted or unsubstituted C₆-C₆₀arylene group, a substituted or unsubstituted C₁-C₆₀heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

a1 to a3 and a11 to a14 are each independently an integer selected from 0 to 5,

Ar₁, Ar₂, Ar₁₁, and Ar₁₂are each independently selected from a substituted or unsubstituted C₃-C₁₀cycloalkyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀aryl group, a substituted or unsubstituted C₁-C₆₀heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group,

R₁, R₂, and R₁₁to R₁₄are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C₁-C₆₀alkyl group, a substituted or unsubstituted C₂-C₆₀alkenyl group, a substituted or unsubstituted C₂-C₆₀alkynyl group, a substituted or unsubstituted C₁-C₆₀alkoxy group, a substituted or unsubstituted C₃-C₁₀cycloalkyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group(aryloxy), a substituted or unsubstituted C₆-C₆₀arylthio group, a substituted or unsubstituted C₁-C₆₀heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q₁)(Q₂)(Q₃),

b2, b12, and b13 are each independently an integer selected from 1 to 3, and b1, b11, and b14 are each independently an integer selected from 1 to 4,

R₃, R₂₁, and R₂₂are each independently selected from a substituted or unsubstituted C₁-C₆₀alkyl group, a substituted or unsubstituted C₂-C₆₀alkenyl group, a substituted or unsubstituted C₂-C₆₀alkynyl group, a substituted or unsubstituted C₁-C₆₀alkoxy group, a substituted or unsubstituted C₃-C₁₀cycloalkyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀arylthio group, a substituted or unsubstituted C₁-C₆₀heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group,

at least one substituent of the substituted C₃-C₁₀cycloalkylene group, substituted C₁-C₁₀heterocycloalkylene group, substituted C₃-C₁₀cycloalkenylene group, substituted C₁-C₁₀heterocycloalkenylene group, substituted C₆-C₆₀arylene group, substituted C₁-C₆₀heteroarylene group, substituted a divalent non-aromatic condensed polycyclic group, substituted a divalent non-aromatic condensed heteropolycyclic group, substituted C₁-C₆₀alkyl group, substituted C₂-C₆₀alkenyl group, substituted C₂-C₆₀alkynyl group, substituted C₁-C₆₀alkoxy group, substituted C₃-C₁₀cycloalkyl group, substituted C₁-C₁₀heterocycloalkyl group, substituted C₃-C₁₀cycloalkenyl group, substituted C₁-C₁₀heterocycloalkenyl group, substituted C₆-C₆₀aryl group, substituted C₆-C₆₀aryloxy group, substituted C₆-C₆₀arylthio group, substituted C₁-C₆₀heteroaryl group, substituted monovalent non-aromatic condensed polycyclic group, and substituted monovalent non-aromatic condensed heteropolycyclic group is selected from

deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀alkynyl group, and a C₁-C₆₀alkoxy group;

a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀alkynyl group, and a C₁-C₆₀alkoxy group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —Si(Q₁₁)(Q₁₂)(Q₁₃), —N(Q₁₄)(Q₁₅), and —B(Q₁₆)(Q₁₇);

a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a phenyl group, a biphenyl group, and a terphenyl group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀alkynyl group, a C₁-C₆₀alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —Si(Q₂₁)(Q₂₂)(Q₂₃), —N(Q₂₄)(Q₂₅), and —B(Q₂₆)(Q₂₇); and

—Si(Q₃₁)(Q₃₂)(Q₃₃), —N(Q₃₄)(Q₃₅), and —B(Q₃₆)(Q₃₇),

wherein Q₁to Q₃, Q₁₁to Q₁₇, Q₂₁to Q₂₇, and Q₃₁to Q₃₇are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀alkynyl group, a C₁-C₆₀alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a phenyl group, a biphenyl group, and a terphenyl group.

Embodiments are also directed to an organic light-emitting device, including a substrate including a first sub-pixel, a second sub-pixel, and a third sub-pixel; a plurality of first electrodes formed according to the first sub-pixel, the second sub-pixel, and the third sub-pixel of the substrate; a second electrode facing the first electrodes; an emission layer that is disposed between the first electrode electrodes and the second electrode and includes a first emission layer, which is disposed between the first electrode and the second electrode of the first sub-pixel and emits first color light, a second emission layer, which is disposed between the first electrode and the second electrode of the second sub-pixel and emits second color light, and a third emission layer, which is disposed between the first electrode and the second electrode of the third sub-pixel and emits third color light; and a hole transport region disposed between the first electrodes and the emission layer, wherein the first color light is red light, the second color light is green light, and the third color light is blue light, the hole transport region includes a first layer disposed between the first electrodes and the emission layer; and a second layer disposed between the first electrodes and the first layer, wherein the first layer is disposed between the first electrode of the third sub-pixel and the third emission layer but is not formed on emission regions of the first sub-pixel and the second sub-pixel, the first layer includes a first compound represented by Formula 1, the second layer includes a second compound represented by Formula 2, and the first compound and the second compound are different from each other.

BRIEF DESCRIPTION OF THE DRAWINGS

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:

FIG. 1 illustrates a schematic view of an organic light-emitting device according to an embodiment; and

FIG. 2 illustrates a schematic view of an organic light-emitting device according to another embodiment.

DETAILED DESCRIPTION

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. Like reference numerals refer to like elements throughout.

As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. Expressions such as “at least one of,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list.

FIG. 1 is a schematic cross-sectional view of an organic light-emitting device 10 according to an example embodiment. In the present example embodiment, the organic light-emitting device 10 includes a first electrode 110, a hole transport region 130, an emission layer 150, an electron transport region 170, and a second electrode 190.

Hereinafter, a structure and a preparation method of an organic light-emitting device according to an example embodiment will be described by referring to FIG. 1.

A substrate may be additionally disposed under the first electrode 110 and on the second electrode 190 as shown in FIG. 1. The substrate may be a glass substrate or transparent plastic substrate, each with excellent mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and water resistance.

The first electrode 110 may be formed by, for example, depositing or sputtering a material for forming the first electrode 110 on the substrate. When the first electrode 110 is an anode, a material for forming the first electrode 110 may be selected from materials with a high work function to facilitate hole injection. The first electrode 110 may be a reflective electrode, a semi-transmissive electrode, or a transmissive electrode. The material for forming the first electrode 110 may be an indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO₂), or zinc oxide (ZnO), each with transparency and excellent conductivity Alternatively, to form the first electrode 110 as a semi-transmissive electrode or a reflective electrode, the material for forming the first electrode 110 may be at least one selected from magnesium (Mg), aluminum (Al), aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), and magnesium-silver (Mg—Ag).

The first electrode 110 may have a single-layer structure, or a multi-layer structure including a plurality of layers. For example, the first electrode 110 may have a triple-layer structure of ITO/Ag/ITO.

The hole transport region 130, the emission layer 150, and the electron transport region 170 are sequentially stacked on the first electrode 110.

In an example embodiment, the hole transport region 130 includes a first compound represented by Formula 1 and a second compound represented by Formula 2, wherein the first compound and the second compound are different from each other:

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In Formulae 1 and 2, X₁and X₁₁may be each independently selected from N, B, and P; and Y₁may be selected from N(R₃), O, and S. In some embodiments, X₁and X₁₁may be identical to or different from each other. In some embodiments, X₁and X₁₁may be identical to each other. In some embodiments, in Formula 1, X₁may be N, and Y₁may be O. In some embodiments, in Formula 2, X₁₁may be N.

In Formulae 1 and 3, L₁to L₃and L₁₁to L₁₄may be each independently selected from a substituted or unsubstituted C₃-C₁₀cycloalkylene group, a substituted or unsubstituted C₁-C₁₀heterocycloalkylene group, a substituted or unsubstituted C₃-C₁₀cycloalkenylene group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenylene group, a substituted or unsubstituted C₆-C₆₀arylene group, a substituted or unsubstituted C₁-C₆₀heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group.

In some embodiments, in Formulae 1 and 2, L₁to L₃and L₁₁to L₁₄may be each independently selected from

a phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an indacenylene group, an acenaphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenalenylene group, a phenanthrenylene group, an anthracenylene group, a fluoranthenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a naphthacenylene group, a picenylene group, a perylenylene group, a pentaphenylene group, a hexacenylene group, a pentacenylene group, a rubicenylene group, a coronenylene group, an ovalenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyrazolylene group, a thiazolylene group, an isothiazolylene group, an oxazolylene group, an isoxazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an isoindolylene group, an indolylene group, an indazolylene group, a purinylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phthalazinylene group, a naphthyridinylene group, a quinoxalinylene group, a quinazolinylene group, a cinnolinylene group, a carbazolylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a phenazinylene group, a benzoimidazolylene group, a benzofuranylene group, a benzothiophenylene group, an isobenzothiazolylene group, a benzoxazolylene group, an isobenzoxazolylene group, a triazolylene group, a tetrazolylene group, an oxadiazolylene group, a triazinylene group, a dibenzofuranylene group, a dibenzothiophenylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a thiadiazolylene group, an imidazopyridinylene group, and an imidazopyrimidinylene group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a biphenyl group, a terphenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl 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 phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, a thiadiazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, and —Si(Q₃₁)(Q₃₂)(Q₃₃),

wherein Q₃₁to Q₃₃are each independently selected from a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, and a carbazolyl group.

In some embodiments, in Formulae 1 and 2, L₁to L₃and L₁₁to L₁₄may be each independently selected from groups represented by Formulae 3-1 to 3-74:

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In Formulae 3-1 to 3-74,

Y₃₁is O, S, C(Z₃)(Z₄), N(Z₅), or Si(Z₆)(Z₇),

Z₁to Z₇are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a carbazolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, and —Si(Q₃₁)(Q₃₂)(Q₃₃),

d2 is 1 or 2,

d3 is an integer selected from 1 to 3,

d4 is an integer selected from 1 to 4,

d5 is an integer selected from 1 to 5,

d6 is an integer selected from 1 to 6,

d8 is an integer selected from 1 to 8, and

* and *′ are a binding site to a neighboring atom.

In Formulae 1 and 2, a1 to a3 and a11 to a14 may be each independently an integer selected from 0 to 5. In Formulae 1 and 2, a1 denotes the number of L₁s. Thus, when a1 is 0, *-(L₁)_a1-*′ is a single bond, and when a1 is 2 or greater, two or more L₁s may be identical to or different from each other. Descriptions of a2, a3, and a11 to a14 may be understood by referring to the description of a1 and structures of Formulae 1 and 2.

In some embodiments, a1 may be an integer selected from 1 to 3, and a2, a3, and a11 to a14 may be each independently an integer selected from 0 to 5.

For example, in Formula 1, a1, a2, and a3 may satisfy:

a1=1, a2=0, and a3=0;

a1=1, a2=1, and a3=0;

a1=1, a2=0, and a3=1;

a1=1, a2=1, and a3=1;

a1=2, a2=0, and a3=0;

a1=2, a2=1, and a3=0;

a1=2, a2=0, and a3=1; or

a1=2, a2=1, and a3=1.

For example, in Formula 2,

a11, a12, and a13 may satisfy:

a11=0, a12=0, and a13=0;

a11=1, a12=0, and a13=0;

a11=0, a12=1, and a13=0;

a11=0, a12=0, and a13=1;

a11=1, a12=1, and a13=0;

a11=1, a12=0, and a13=1;

a11=0, a12=1, and a13=1; or

a11=1, a12=1, and a13=1.

In Formula 1, *-(L₁)_a1-*′ may be selected from groups represented by Formulae 4-1 to 4-29:

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In Formulae 4-1 to 4-29,

T₁to T₃are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a carbazolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, and —Si(Q₃₁)(Q₃₂)(Q₃₃),

c1 to c3 are each independently an integer selected from 1 to 4, and

* and *′ are a binding site to a neighboring atom.

In some embodiments, in Formula 1, *-(L₁)_a1-*′ may be selected from groups represented by Formulae 4-1 to 4-10, but embodiments are not limited thereto.

In Formulae 1 and 2, Ar₁, Ar₂, Ar₁₁, and Ar₁₂may be each independently selected from a substituted or unsubstituted C₃-C₁₀cycloalkyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀aryl group, a substituted or unsubstituted C₁-C₆₀heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group.

In some embodiments, in Formulae 1 and 2, Ar₁, Ar₂, Ar₁₁, and Ar₁₂may be each independently selected from

a phenyl group, a biphenyl group, a terphenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl 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 phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, a thiadiazolyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a biphenyl group, a terphenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl 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 phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, a thiadiazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, and —Si(Q₃₁)(Q₃₂)(Q₃₃),

wherein Q₃₁to Q₃₃may be each independently selected from a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, and a carbazolyl group.

In some embodiments, in Formulae 1 and 2, Ar₁, Ar₂, Ar₁₁, and Ar₁₂may be each independently selected from groups represented by Formulae 5-1 to 5-89:

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In Formulae 5-1 to 5-89,

Y₅₁is O, S, C(Z₃₃)(Z₃₄), N(Z₃₅), or Si(Z₃₆)(Z₃₇),

Z₃₁to Z₃₇are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a carbazolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, and —Si(Q₃₁)(Q₃₂)(Q₃₃),

wherein Q₃₁to Q₃₃are each independently C₁-C₂₀alkyl group, C₁-C₂₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, and a carbazolyl group,

e2 is 1 or 2,

e3 is an integer selected from 1 to 3,

e4 is an integer selected from 1 to 4,

e5 is an integer selected from 1 to 5,

e6 is an integer selected from 1 to 6,

e7 is an integer selected from 1 to 7,

e8 is an integer selected from 1 to 8, and

* is a binding site to a neighboring atom.

In some embodiments, in Formulae 1 and 2, Ar₁, Ar₂, Ar₁₁, and Ar₁₂may be each independently selected from groups represented by Formulae 6-1 to 6-7 and 6-9 to 6-144:

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In Formulae 6-1 to 6-7 and 6-9 to 6-144, * is a binding site to a neighboring atom.

In Formulae 1 and 2, R₁, R₂, and R₁₁to R₁₄are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C₁-C₆₀alkyl group, a substituted or unsubstituted C₂-C₆₀alkenyl group, a substituted or unsubstituted C₂-C₆₀alkynyl group, a substituted or unsubstituted C₁-C₆₀alkoxy group, a substituted or unsubstituted C₃-C₁₀cycloalkyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀arylthio group, a substituted or unsubstituted C₁-C₆₀heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q₁)(Q₂)(Q₃),

wherein Q₁to Q₃may be each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀alkynyl group, a C₁-C₆₀alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a phenyl group, a biphenyl group, and a terphenyl group.

In some embodiments, in Formulae 1 and 2, R₁, R₂, and R₁₁to R₁₄are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a carbazolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, and —Si(Q₁)(Q₂)(Q₃),

wherein Q₁to Q₃may be each independently selected from a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, and a carbazolyl group.

In some embodiments, in Formulae 1 and 2, R₁, R₂, and R₁₁to R₁₄may be each independently selected from

hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₂₀alkyl group, and a C₁-C₂₀alkoxy group;

a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl 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, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₁₀alkyl group, a C₁-C₁₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl 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, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, and —Si(Q₃₁)(Q₃₂)(Q₃₃); and

—Si(Q₁)(Q₂)(Q₃),

wherein Q₁to Q₃and Q₃₁to Q₃₃may be each independently selected from a C₁-C₁₀alkyl group, a C₁-C₁₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group.

In some embodiments, in Formulae 1 and 2, R₁, R₂, and R₁₁to R₁₄may be each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C₁-C₂₀alkyl group, and a substituted or unsubstituted C₁-C₂₀alkoxy group, but embodiments are not limited thereto.

In Formulae 1 and 2, b2, b12, and b13 may be each independently an integer selected from 1 to 3, and b1, b11, and b14 may be each independently an integer selected from 1 to 4. In Formulae 1 and 2, b1 denotes the number of R₁s, and when b1 is 2 or greater, two or more R₁s may be identical to or different from each other. Descriptions of b2 and b11 to b14 may be understood by referring to the description of b1 and structures of Formulae 1 and 2.

In Formulae 1 and 2, R₃(of Y₁), R₂₁, and R₂₂may be each independently selected from a substituted or unsubstituted C₁-C₆₀alkyl group, a substituted or unsubstituted C₂-C₆₀alkenyl group, a substituted or unsubstituted C₂-C₆₀alkynyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted C₃-C₁₀cycloalkyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀arylthio group, a substituted or unsubstituted C₁-C₆₀heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group.

In some embodiments, in Formulae 1 and 2, R₃, R₂₁, and R₂₂may be each independently selected from

a C₁-C₂₀alkyl group and a C₁-C₂₀alkoxy group;

a phenoxy group, a phenylthio group, a phenyl group, a biphenyl group, a terphenyl 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 benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, and an imidazopyrimidinyl group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl 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 benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, and —Si(Q₃₁)(Q₃₂)(Q₃₃),

wherein Q₃₁to Q₃₃may be each independently selected from a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, and a carbazolyl group.

In some embodiments, the first compound may be represented by one of Formulae 1AA to 1LD:

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In Formulae 1AA to 1LD,

X₁, Y₁, L₂, L₃, a2, a3, Ar₁, Ar₂, R₁, R₂, b1, b2, T₁, and T₂are the same as provided here in the present specification.

In some embodiments, the first compound may be represented by one of Formulae 1AA-1 to 1LD-4:

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In Formulae 1AA-1 to 1LD-4, X₁, Y₁, L₃, a3, Ar₂, R₁, R₂, b1, b2, T₁, T₂, c1, c2, Z₁, Z₃₁, d4, e5, and e7 are the same as provided here in the present specification.

In some embodiments, the second compound may be represented by Formula 2A:

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In Formula 2A, X₁₁, L₁₂, L₁₄, a12, a14, Ar₁₁, Ar₁₂, R₁₁to R₁₄, b11 to b14, R₂₁, R₂₂, Z₁and d4 are the same as provided here in the present specification.

In some embodiments, in Formulae 1 and 2,

X₁and X₁₁may be each independently selected from N, B, and P,

Y₁may be selected from O and S,

L₁to L₃and L₁₁to L₁₄may be each independently selected from groups represented by Formulae 3-1 to 3-74,

Ar₁, Ar₂, Ar₁₁, and Ar₁₂may be each independently selected from groups represented by Formulae 5-1 to 5-89, and

R₂₁and R₂₂may be each independently selected from a methyl group and a phenyl group.

The first compound may be selected from, for example, Compounds 1 to 57, and the second compound may be selected from, for example, Compounds 101 to 109:

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When the hole transport region 130 of the organic light-emitting device includes the first compound represented by Formula 1 and the second compound represented by Formula 2, an amount of holes in the organic light-emitting device may be effectively controlled to enhance quantitative balance between holes and electrons, and thus recombination of the holes and electrons may be enhanced. In this regard, the organic light-emitting device may have a high efficiency and long lifespan characteristics.

In some embodiments, the hole transport region 130 may include a first layer and a second layer, wherein the first layer may include the first compound, the second layer may include the second compound, the first layer may be disposed between the first electrode 110 and the emission layer 150, and the second layer may be disposed between the first electrode 110 and the first layer.

In some embodiments, the first layer and the second layer may be in direct contact, and the first layer and the emission layer 150 may be in direct contact, but embodiments are not limited thereto.

Thicknesses of the first layer and the second layer may be each independently selected in a range of, for example, about 10 Å to about 1500 Å, or, for example, about 20 Å to about 1000 Å. When the thicknesses of the first layer and the second layer are within these ranges, hole transporting characteristics may be satisfactory without a substantial increase in driving voltage.

In some embodiments, a thickness of the first layer may be in a range of about 10 Å to about 300 Å, or, for example, about 30 Å to about 200 Å, and a thickness of the second layer may be in a range of about 100 Å to about 1000 Å, or, for example, about 100 Å to about 500 Å, but embodiments are not limited thereto.

In some embodiments, the hole transport region 130 may further include at least one of a hole injection layer (HIL), an electron blocking layer (EBL), and a buffer layer, in addition to the first layer and the second layer described above.

For example, the hole transport region 130 may have a structure of second layer/first layer, a structure of hole injection layer/second layer/first layer/, a structure of second layer/first layer/electron blocking layer, or a structure of hole injection layer/second layer/first layer/electron blocking layer sequentially stacked on the first electrode 110.

When the hole transport region 130 includes the hole injection layer, the hole injection layer may be formed on the first electrode 110 by using a suitable method, such as vacuum deposition, spin coating, casting, a Langmuir-Blodgett (LB) method, inkjet printing, laser printing, or laser-induced thermal imaging (LITI).

When the hole injection layer is formed by vacuum deposition, the vacuum deposition conditions may vary according to the desired structure of the hole injection layer. For example, the vacuum deposition may be performed at a deposition temperature in a range of about 100° C. to about 500° C., a pressure in a range of about 10⁻⁸torr to about 10⁻³torr, and a deposition rate in a range of about 0.01 Å/sec to about 100 Å/sec.

When the hole injection layer is formed by spin coating, the coating conditions may vary according to the desired structure of the hole injection layer. For example, the coating rate may be in a range of about 2,000 to about 5,000 rpm, and the temperature for heat treatment may be in a range of about 80° C. to about 200° C.

Next, the second layer and the first layer may be formed on the first electrode 110 or on the hole injection layer by using a suitable method, such as vacuum deposition, spin coating, casting, a Langmuir-Blodgett (LB) method, inkjet printing, laser printing, or laser-induced thermal imaging (LITI). When the second layer and the first layer are formed by vacuum deposition or by spin coating, deposition conditions and coating conditions of the second layer and the first layer may be referred to the deposition conditions and coating conditions used for the formation of the hole injection layer.

The hole transport region may further include at least one selected from m-MTDATA, TDATA, 2-TNATA, NPB, β-NPB, TPD, Spiro-TPD, Spiro-NPB, α-NPB, TAPC, 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), and (polyaniline)/poly(4-styrenesulfonate) (PANI/PSS), in addition to the first compound and the second compound:

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A thickness of the hole transport region may be in a range of about 100 Å to about 10,000 Å, or, for example, about 100 Å to about 1,000 Å. For example, when the hole transport region includes both the hole injection layer and the hole transport layer, a thickness of the hole injection layer may be in a range of about 100 Å to about 10,000 Å, or, 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, or, for example, about 100 Å to about 1,500 Å. When the thickness of the hole transport region, hole injection layer, and hole transport layer are within these ranges, hole transport characteristics may be satisfactory without a substantial increase in driving voltage.

The hole transport region may further include a charge-generating material to increase conductivity, in addition to the materials described above. The charge-generating material may be homogeneously or non-homogenously dispersed in the hole transport region.

The charge-generating material may be, for example, a p-dopant. The p-dopant may be, for example, a quinone derivative, a metal oxide, a cyano group-containing compound, etc. Examples of the p-dopant may include quinone derivatives such as tetracyanoquinonedimethane (TCNQ) and 2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinonedimethane (F4-TCNQ); metal oxides such as a tungsten oxide and a molybdenum oxide; and Compound HT-D1:

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The hole transport region may further include an electron blocking layer, in addition to the hole injection layer, the hole transport layer, and an auxiliary layer, as described above. The electron blocking layer blocks injection of electrons from the electron transport region.

The emission layer 150 is formed on the first electrode 110 or on the hole transport region 130 by using a suitable method, such as vacuum deposition, spin coating, casting, a Langmuir-Blodgett (LB) method, inkjet printing, laser printing, or laser-induced thermal imaging (LITI). When the emission layer 150 is formed by vacuum deposition or by spin coating, deposition conditions and coating conditions of the emission layer 150 may be referred to the deposition conditions and coating conditions used for the formation of the hole injection layer.

When the organic light-emitting device 10 is a full-color organic light-emitting device, the emission layer 150 may be patterned into a red emission layer, a green emission layer, and a blue emission layer for pixels of each color. In another implementation, the emission layer may have a structure including the emission layer, green emission layer, and blue emission layer that are stacked therein, or a structure including a red light emitting material, a green light emitting material, and a blue light emitting material that are mixed in one layer, thereby emitting white light.

The emission layer 150 may include a host and a dopant.

The host may include a compound represented by Formula 301:

Ar₃₀₁-[(L₃₀₁)_xb1-R₃₀₁]_xb2 <Formula 301>

In Formula 301,

Ar₃₀₁may be selected from

a naphthalene, a heptalene, a fluorene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀alkynyl group, a C₁-C₆₀alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q₃₀₁)(Q₃₀₂)(Q₃₀₃) (where, Q₃₀₁to Q₃₀₃are each independently selected from hydrogen, a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₆-C₆₀aryl group, and a C₁-C₆₀heteroaryl group),

L₃₀₁may be the same as defined in connection with L₁;

R₃₀₁may be selected from

a C₁-C₂₀alkyl group and a C₁-C₂₀alkoxy group;

a C₁-C₂₀alkyl group and a C₁-C₂₀alkoxy group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group;

xb1 may be selected from 0, 1, 2, and 3, and

xb2 may be selected from 1, 2, 3, and 4.

In some embodiments, in Formula 301,

L₃₀₁may be selected from

a phenylene group, a naphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthracenylene group, a pyrenylene group, and a chrysenylene group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, and a chrysenyl group,

R₃₀₁may be selected from

a C₁-C₂₀alkyl group and a C₁-C₂₀alkoxy group;

a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, and a chrysenyl group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, and a chrysenyl group, but embodiments are not limited thereto.

In some embodiments, the host may include a compound represented by Formula 301A:

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In Formula 301A, substituents are the same as description provided herein.

The compound represented by Formula 301 may include, for example, at least one of Compounds H1 to H42:

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In some embodiments, the host may include, for example, at least one of Compounds H43 to H49:

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In some embodiments, the host may include, for example, at least one of compounds below:

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The dopant may include, for example, at least one of a fluorescent dopant and a phosphorescent dopant.

The phosphorescent dopant may include, for example, an organometallic complex represented by Formula 401:

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In Formula 401,

M is selected from iridium (Ir), platinum (Pt), osmium (Os), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb), and thulium (Tm),

X₄₀₁to X₄₀₄are each independently nitrogen or carbon,

rings A₄₀₁and A₄₀₂are each independently a substituted or unsubstituted benzene, a substituted or unsubstituted naphthalene, a substituted or unsubstituted fluorene, a substituted or unsubstituted spiro-fluorene, a substituted or unsubstituted indene, a substituted or unsubstituted pyrrole, a substituted or unsubstituted thiophene, a substituted or unsubstituted furan, a substituted or unsubstituted imidazole, a substituted or unsubstituted pyrazole, a substituted or unsubstituted thiazole, a substituted or unsubstituted isothiazole, a substituted or unsubstituted oxazole, a substituted or unsubstituted isoxazole, a substituted or unsubstituted pyridine, a substituted or unsubstituted pyrazine, a substituted or unsubstituted pyrimidine, a substituted or unsubstituted pyridazine, a substituted or unsubstituted quinoline, a substituted or unsubstituted isoquinoline, a substituted or unsubstituted benzoquinoline, a substituted or unsubstituted quinoxaline, a substituted or unsubstituted quinazoline, a substituted or unsubstituted carbazole, a substituted or unsubstituted benzoimidazole, a substituted or unsubstituted benzofuran, a substituted or unsubstituted benzothiophene, a substituted or unsubstituted isobenzothiophene, a substituted or unsubstituted benzoxazole, a substituted or unsubstituted isobenzoxazole, a substituted or unsubstituted triazole, a substituted or unsubstituted oxadiazole, a substituted or unsubstituted triazine, a substituted or unsubstituted dibenzofuran, and a substituted or unsubstituted dibenzothiophene,

at least one substituent of the substituted benzene, substituted naphthalene, substituted fluorene, substituted spiro-fluorene, substituted indene, substituted pyrrole, substituted thiophene, substituted furan, substituted imidazole, substituted pyrazole, substituted thiazole, substituted isothiazole, substituted oxazole, substituted isoxazole, substituted pyridine, substituted pyrazine, substituted pyrimidine, substituted pyridazine, substituted quinoline, substituted isoquinoline, substituted benzoquinoline, substituted quinoxaline, substituted quinazoline, substituted carbazole, substituted benzoimidazole, substituted benzofuran, substituted benzothiophene, substituted isobenzothiophene, substituted benzoxazole, substituted isobenzoxazole, substituted triazole, substituted oxadiazole, substituted triazine, substituted dibenzofuran, and substituted dibenzothiophene is

a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀alkynyl group, and a C₁-C₆₀alkoxy group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₆-C₆₀aryloxy group(aryloxy), a C₆-C₆₀arylthio group(arylthio), a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group(non-aromatic condensed polycyclic group), a monovalent non-aromatic condensed heteropolycyclic group, —N(Q₄₀₁)(Q₄₀₂), —Si(Q₄₀₃)(Q₄₀₄)(Q₄₀₅), and —B(Q₄₀₆)(Q₄₀₇);

a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀alkynyl group, a C₁-C₆₀alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —N(Q₄₁₁)(Q₄₁₂), —Si(Q₄₁₃)(Q₄₁₄)(Q₄₁₅), and —B(Q₄₁₆)(Q₄₁₇); and

—N(Q₄₂₁)(Q₄₂₂), —Si(Q₄₂₃)(Q₄₂₄)(Q₄₂₅), and —B(Q₄₂₆)(Q₄₂₇),

L₄₀₁is an organic ligand,

xc1 is 1, 2, or 3, and

xc2 is 0, 1, 2, or 3,

wherein Q₄₀₁to Q₄₀₇, Q₄₁₁to Q₄₁₇, and Q₄₂₁to Q₄₂₇are each independently the same as defined in connection with Q₁.

L₄₀₁may be a monovalent, divalent, or trivalent organic ligand. For example, L₄₀₁may be selected from a halogen ligand (e.g., Cl or F), a diketone ligand (e.g., acetylacetonate, 1,3-diphenyl-1,3-propanedionate, 2,2,6,6-tetramethyl-3,5-heptanedionate, or hexafluoroacetonate), a carboxylic acid ligand (e.g., picolinate, dimethyl-3-pyrazolecarboxylate, or benzoate), a carbon monoxide ligand, an isonitrile ligand, a cyano group ligand, and a phosphorus ligand (e.g., phosphine, or phosphite), etc.

In Formula 401, when A₄₀₁has two or more substituents, the two or more substituents of A₄₀₁may link to each other and form a saturated or unsaturated ring.

In Formula 401, when A₄₀₂has two or more substituents, the two or more substituents of A₄₀₂may link to each other and form a saturated or unsaturated ring.

In Formula 401, when xc1 is 2 or greater, a plurality of ligands,

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Formula 401 may be identical to or different from each other. In Formula 401, when xc1 is 2 or greater, A₄₀₁and A₄₀₂may be directly linked to A₄₀₁and A₄₀₂of another neighboring ligand or via a linking group (e.g., a C₁-C₅alkylene group, —N(R′)— (where, R′ is a C₁-C₁₀alkyl group or a C₆-C₂₀aryl group), or —C(═O)—).

For example, the phosphorescent dopant may include at least one of Compounds PD1 to PD74:

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In some embodiments, the phosphorescent dopant may include PtOEP:

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The fluorescent dopant may include at least one selected from DPAVBi, BDAVBi, TBPe, DCM, DCJTB, Coumarin 6, and C545T:

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In some embodiments, the fluorescent dopant may include a compound represented by Formula 501:

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In Formula 501,

Ar₅₀₁may be selected from

a naphthalene, a heptalene, a fluorene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀alkynyl group, a C₁-C₆₀alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q₅₀₁)(Q₅₀₂)(Q₅₀₃) (where, Q₅₀₁to Q₅₀₃are each independently selected from hydrogen, a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₆-C₆₀aryl group, and a C₂-C₆₀heteroaryl group),

L₅₀₁to L₅₀₃may be the same as defined in connection with L₂₀₁,

R₅₀₁and R₅₀₂may be each independently selected from

xd1 to xd3 may be each independently selected from 0, 1, 2, and 3, and

xd4 may be selected from 1, 2, 3, and 4.

The fluorescent dopant may include at least one of Compounds FD1 to FD9:

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In the emission layer 150, an amount of the dopant may be, for example, about 0.01 part to about 15 parts by weight based on 100 parts by weight of the host.

A thickness of the emission layer 150 may be in a range of, for example, about 100 Å to about 1000 Å, or, for example, about 200 Å to about 600 Å. When the thickness of the emission layer 150 is within this range, emission characteristics may be satisfactory without a substantial increase in driving voltage.

Next, the electron transport region 170 may be disposed on the emission layer 150.

The electron transport region 170 may include, for example, at least one selected from a hole blocking layer, an electron transport layer, and an electron injection layer.

In some embodiments, the electron transport region 170 may have a structure of, for example, electron transport layer/electron injection layer or hole blocking layer/electron transport layer/electron injection layer sequentially stacked on the emission layer 150.

A method of forming the charge control layer and the electron injection layer may refer to the method of forming the hole injection layer.

The electron transport layer may include at least one selected from a compound represented by Formula 601 and a compound represented by Formula 602:

Ar-[(L₆₀₁)_xe1-E₆₀₁]_xe2 <Formula 601>

wherein, in Formula 601,

Ar₆₀₁may be selected from

a naphthalene, a heptalene, a fluorene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀alkynyl group, a C₁-C₆₀alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q₃₀₁)(Q₃₀₂)(Q₃₀₃) (where, Q₃₀₁to Q₃₀₃are each independently hydrogen, a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₆-C₆₀aryl group, or a C₁-C₆₀heteroaryl group),

the descriptions for L₆₀₁may be the same as defined in connection with L₂₀₁herein,

E₆₀₁may be selected from

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 phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, and an imidazopyrimidinyl group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₂₀alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl 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 phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, and an imidazopyrimidinyl group,

xe1 may be selected from 0, 1, 2, and 3; and

xe2 may be selected from 1, 2, 3, and 4.

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In Formula 602,

X₆₁₁may be N or C-(L₆₁₁)_xe611-R₆₁₁, X₆₁₂may be N or C-(L₆₁₂)_xe612-R₆₁₂, X₆₁₃may be N or C-(L₆₁₃)_xe613-R₆₁₃, and at least one selected from X₆₁₁to X₆₁₃may be N,

L₆₁₁to L₆₁₆may be the same as defined in connection with L₁provided herein,

R₆₁₁to R₆₁₆may be each independently selected from

xe611 to xe616 may be each independently selected from 0, 1, 2, and 3.

The compound represented by Formula 601 and the compound represented by Formula 602 may be each independently selected from, for example, Compounds ET1 to ET15:

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In some embodiments, the electron transport layer may include, for example, at least one selected from BCP, Bphen, Alq₃, BAlq, TAZ, and NTAZ:

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A thickness of the electron transport layer may be in a range of about 100 Å to about 1000 Å, or, for example, about 150 Å to about 500 Å. When the thickness of the electron transport layer is within this range, electron transport characteristics may be satisfactory without a substantial increase in driving voltage.

The electron transport layer may further include a metal-containing material in addition to the materials described above.

The metal-containing material may include a Li complex. The Li complex may include, for example, Compound ET-D1 (lithium quinolate, LiQ) or ET-D2:

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The electron transport region 170 may include an electron injection layer that facilitates electron injection from the second electrode 190.

The electron injection layer may be formed on the electron transport layer by using various methods, such as vacuum-deposition, spin coating, casting, LB method, ink-jet printing, laser-printing, or LITI. When the electron injection layer is formed by vacuum-deposition or spin coating, vacuum-deposition and coating conditions for the electron injection layer may be determined by referring to the vacuum-deposition and coating conditions for the hole injection layer.

The electron injection layer may include, for example at least one of LiF, NaCl, CsF, Li₂O, BaO, and LiQ.

A thickness of the electron injection layer may be in a range of, for example, about 1 Å to about 100 Å, or, for example, about 3 Å to about 90 Å. When the thickness of the electron injection layer is within this range, electron injection characteristics may be satisfactory without a substantial increase in driving voltage.

The second electrode 190 is disposed on the electron transport region 170. The second electrode 190 may be a cathode that is an electron injection electrode, and in this regard, a material for forming the second electrode 190 may be a material having a low work function, and such a material may be metal, alloy, an electrically conductive compound, or a mixture thereof. Examples of a material for forming the second electrode 190 may include lithium (Li), magnesium (Mg), aluminum (Al), aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), and magnesium-silver (Mg—Ag). In some embodiments, the material for forming the second electrode 190 may be ITO or IZO. The second electrode 190 may be a semi-transmissive electrode or a transmissive electrode

Hereinbefore, the organic light-emitting device 10 has been described with reference to FIG. 1, but embodiments are not limited thereto.

FIG. 2 is a schematic view of a structure of an organic light-emitting device according to an example embodiment. The organic light-emitting device shown in FIG. 2 includes a substrate 201 including a first sub-pixel, a second sub-pixel, and a third sub-pixel; a plurality of first electrodes 210 that are formed according to the first sub-pixel, the second sub-pixel, and the third sub-pixel of the substrate 201; a second electrode 290 facing the first electrodes 210; an emission layer 250 that is disposed between the first electrodes 210 and the second electrode 290 and includes a first emission layer 250-1, which is disposed between the first electrode 210 of the first pixel and the second electrode 290 and emits first color light, a second emission layer 250-2, which is disposed between the first electrode 210 of the second sub-pixel and the second electrode 190 and emits second color light, and a third emission layer 250-3, which is disposed between the first electrode 210 of the third sub-pixel and the second electrode 290 and emits third color light; and an electron transport region 270.

In FIG. 2, the substrate 201, the first electrodes 210, the emission layer 250, the electron transport region 270, and the second electrode 290 are the same as those defined in connection with FIG. 1.

A second layer 232 may be formed on the plurality of the first electrodes 210 as a common layer with respect to all of the first sub-pixel, the second sub-pixel, and the third sub-pixel. The second layer 232 includes the second compound represented by Formula 2. The description of the second layer 232 may refer to the description of “the second layer” provided in the present specification.

In the first sub-pixel, a first auxiliary layer 231-1 is disposed between the second layer 232 and the first emission layer 250-1, and, in the second sub-pixel, a second auxiliary layer 231-2 is disposed between the second layer 232 and the second emission layer 250-2. The first auxiliary layer 231-1 and the second auxiliary layer 231-2 may each control a resonance distance in line with wavelengths of the first color light and the second color light, respectively. For example, in FIG. 2, a thickness of the first auxiliary layer 231-1 may be thicker than a thickness of the second auxiliary layer 231-2.

In the third sub-pixel, a first layer 231-3 is disposed between the second layer 232 and the third emission layer 250-3. The first layer 231-3 is not formed in an emission region of the first sub-pixel and the second sub-pixel but is patterned on an emission region of the third sub-pixel. The first layer 231-3 includes the first compound represented by Formula 1. The description of the first layer 231-3 may refer to the description of “the first layer” provided in the present specification.

In FIG. 2, when the first color light, second color light, and third color light are combined, white light is emitted, where the first color light is red light, the second color light is green light, and the third color light is blue light.

The organic light-emitting device shown in FIG. 2 includes the first auxiliary layer 231-1 and the second auxiliary layer 231-2, but at least one of the first auxiliary layer 231-1 and the second auxiliary layer 231-2 may be omitted in some embodiments. Also, embodiments of the organic light-emitting device shown in FIG. 2 may vary as a hole injection layer may be further disposed between the second layer 232 and the first electrode 210.

A C₁-C₆₀alkyl group used herein refers to a linear or branched aliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms, and examples thereof are a methyl group, an ethyl group, a propyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a pentyl group, an iso-amyl group, and a hexyl group. A C₁-C₆₀alkylene group used herein refers to a divalent group having the same structure as the C₁-C₆₀alkyl group.

A C₁-C₆₀alkoxy group used herein refers to a monovalent group represented by —OA₁₀₁(wherein A₁₀₁is the C₁-C₆₀alkyl group), and detailed examples thereof are a methoxy group, an ethoxy group, and an isopropyloxy group.

A C₂-C₆₀alkenyl group used herein refers to a hydrocarbon group formed by substituting at least one carbon double bond of the C₂-C₆₀alkyl group, and examples thereof are an ethenyl group, a propenyl group, and a butenyl group. A C₂-C₆₀alkenylene group used herein refers to a divalent group having the same structure as a C₂-C₆₀alkenyl group.

A C₂-C₆₀alkynyl group used herein refers to a hydrocarbon group formed by substituting at least one carbon triple bond of the C₂-C₆₀alkyl group, and examples thereof are an ethynyl group and a propynyl group. A C₂-C₆₀alkynylene group used herein refers to a divalent group having the same structure as a C₂-C₆₀alkynyl group.

A C₃-C₁₀cycloalkyl group used herein refers to a monovalent monocyclic saturated hydrocarbon group including 3 to 10 carbon atoms, and detailed examples thereof are a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cycloheptyl group. A C₃-C₁₀cycloalkylene group used herein refers to a divalent group having the same structure as a C₃-C₁₀cycloalkyl group.

A C₁-C₁₀heterocycloalkyl group used herein refers to a monovalent monocyclic group including at least one hetero atom selected from N, O, P, and S as a ring-forming atom and 1 to 10 carbon atoms, and examples thereof are a tetrahydrofuranyl group and a tetrahydrothiophenyl group. A C₁-C₁₀heterocycloalkylene group used herein refers to a divalent group having the same structure as a C₁-C₁₀heterocycloalkyl group.

A C₃-C₁₀cycloalkenyl group used herein refers to a monovalent monocyclic group including 3 to 10 carbon atoms and at least one double bond in the ring thereof and does not have aromaticity, and examples thereof are a cyclopentenyl group, a cyclohexenyl group, and a cycloheptenyl group. A C₃-C₁₀cycloalkenylene group used herein refers to a divalent group having the same structure as a C₃-C₁₀cycloalkenyl group.

A C₁-C₁₀heterocycloalkenyl group used herein refers to a monovalent monocyclic group including at least one hetero atom selected from N, O, P, and S as a ring-forming atom, 1 to 10 carbon atoms, and at least one double bond in its ring. Examples of the C₁-C₁₀heterocycloalkenyl group are a 2,3-hydrofuranyl group and a 2,3-hydrothiophenyl group. A C₁-C₁₀heterocycloalkenylene group used herein refers to a divalent group having the same structure as a C₁-C₁₀heterocycloalkenyl group.

A C₆-C₆₀aryl group used herein refers to a monovalent group including a carbocyclic aromatic system having 6 to 60 carbon atoms, and a C₆-C₆₀arylene group used herein refers to a divalent group including a carbocyclic aromatic system having 6 to 60 carbon atoms. Examples of the C₆-C₆₀aryl group are a phenyl group, a naphthyl group, an anthracenyl group, a phenanthrenyl group, a pyrenyl group, and a chrysenyl group. When the C₆-C₆₀aryl group and the C₆-C₆₀arylene group each include a plurality of rings, the plurality of rings may be fused to each other.

A C₁-C₆₀heteroaryl group used herein refers to a monovalent group having a carbocyclic aromatic system having at least one hetero atom selected from N, O, P, and S as a ring-forming atom and 1 to 60 carbon atoms. A C₁-C₆₀heteroarylene group used herein refers to a divalent group having a carbocyclic aromatic system having at least one hetero atom selected from N, O, P, and S as a ring-forming atom and 1 to 60 carbon atoms. Examples of the C₁-C₆₀heteroaryl group are a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, and an isoquinolinyl group. When the C₁-C₆₀heteroaryl group and the C₁-C₆₀heteroarylene group each include a plurality of rings, the plurality of rings may be fused to each other.

A C₆-C₆₀aryloxy group used herein indicates —OA₁₀₂(wherein A₁₀₂is the C₆-C₆₀aryl group), and a C₆-C₆₀arylthio group used herein indicates —SA₁₀₃(wherein A₁₀₃is the C₆-C₆₀aryl group).

A monovalent non-aromatic condensed polycyclic group used herein refers to a monovalent group that has 2 or greater rings condensed to each other, and has only carbon atoms (for example, the number of carbon atoms may be in a range of 8 to 60) as ring forming atoms, wherein the molecular structure as a whole is non-aromatic in the entire molecular structure. An example of the monovalent non-aromatic condensed polycyclic group is a fluorenyl group. A divalent non-aromatic condensed polycyclic group used herein refers to a divalent group having the same structure as the monovalent non-aromatic condensed polycyclic group.

A monovalent non-aromatic condensed heteropolycyclic group used herein refers to a monovalent group that has 2 or greater rings condensed to each other, has a hetero atom selected from N, O, P, and S, other than carbon atoms (for example, the number of carbon atoms may be in a range of 1 to 60), as ring-forming atoms, wherein the molecular structure as a whole is non-aromatic in the entire molecular structure. The monovalent non-aromatic condensed heteropolycyclic group includes a carbazolyl group. A divalent non-aromatic condensed hetero-polycyclic group used herein refers to a divalent group having the same structure as the monovalent non-aromatic condensed hetero-polycyclic group.

At least one substituent of the substituted C₃-C₁₀cycloalkylene group, substituted C₁-C₁₀heterocycloalkylene group, substituted C₃-C₁₀cycloalkenylene group, substituted C₁-C₁₀heterocycloalkenylene group, substituted C₆-C₆₀arylene group, substituted C₁-C₆₀heteroarylene group, substituted a divalent non-aromatic condensed polycyclic group, substituted a divalent non-aromatic condensed heteropolycyclic group, substituted C₁-C₆₀alkyl group, substituted C₂-C₆₀alkenyl group, substituted C₂-C₆₀alkynyl group, substituted C₁-C₆₀alkoxy group, substituted C₃-C₁₀cycloalkyl group, substituted C₁-C₁₀heterocycloalkyl group, substituted C₃-C₁₀cycloalkenyl group, substituted C₁-C₁₀heterocycloalkenyl group, substituted C₆-C₆₀aryl group, substituted C₆-C₆₀aryloxy group, substituted C₆-C₆₀arylthio group, substituted C₁-C₆₀heteroaryl group, substituted monovalent non-aromatic condensed polycyclic group, and substituted monovalent non-aromatic condensed heteropolycyclic group is selected from

a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀alkynyl group, a C₁-C₆₀alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —Si(Q₂₁)(Q₂₂)(Q₂₃), and —B(Q₂₄)(Q₂₅); and

—Si(Q₃₁)(Q₃₂)(Q₃₃) and —B(Q₃₄)(Q₃₅),

wherein Q₁to Q₅, Q₁₁to Q₁₅, Q₂₁to Q₂₅, and Q₃₁to Q₃₅may be each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀alkynyl group, a C₁-C₆₀alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀aryl group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.

“Ph” used herein refers to a phenyl group, “Me” refers to a methyl group, “Et” refers to an ethyl group, and “ter-Bu” or “Bu^t” refers to a tert-butyl group.

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.

The wording “B was used instead of A” used in describing Synthesis Examples means that a molar equivalent of A was identical to a molar equivalent of B.

EXAMPLE
[Synthesis Example 1] Synthesis of Compound 2

Compound 2 was synthesized according to Reaction Scheme 1-(1):

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<Step 1> Synthesis of Compound 1B

10.2 g of Compound 1A, 6.00 g of 1-iodo-3-bromobenzene, 1.54 g of Pd(PPh₃)₄, 5.25 g of potassium carbonate, 450 ml of toluene, and 60 ml of water were mixed in a 1 L 3-neck flask in an argon atmosphere and stirred at 90° C. for 8 hours.

After the reaction was completed, water was added thereto to obtain an organic layer, and the organic layer was distilled, purified through a column chromatography (with a mixture solvent of dichloromethane and hexane), and re-crystallized with a mixture solvent of toluene and hexane to obtain 9.72 g of Compound 1B (yield 88%) as white solid.

<Step 2> Synthesis of Compound 1C

55.2 g of Compound 1B, 6.46 g of Pd(dppf)Cl₂.CH₂Cl₂, 33.3 g of KOAc, 33.0 g of bis(pinacolato)diboron, and 750 ml of dioxane were mixed in a 2 L-flask in an argon atmosphere, vacuum-degassed, and stirred at 100° C. for 12 hours.

When the reaction was completed, the solvent was distilled, an organic layer was separated with CH₂Cl₂, the organic layer was dried with MgSO₄, and the solvent was distilled. Then, the resultant was purified through a column chromatography (with a mixture solvent of dichloromethane and hexane), and re-crystallized with a mixture solvent of toluene and hexane to obtain 56.9 g of Compound 1C (yield 95%) as white solid.

<Step 3> Synthesis of Compound 1D

2.70 g of Compound 1C, 3.70 g of 4,6-dibromodibenzofuran, 0.34 g of Pd(PPh₃)₄, 1.25 g of potassium carbonate, 50 ml of toluene, and 20 ml of water were mixed in a 300 ml 3-neck flask in an argon atmosphere and stirred at 90° C. for 8 hours.

After the reaction was completed, water was added thereto to obtain an organic layer, and the organic layer was distilled and purified through a column chromatography (with a mixture solvent of dichloromethane and hexane) to obtain 1.78 g of Compound 1D (yield 55%) as white solid.

¹H NMR: 7.70 (1H), 7.48 (6H), 7.45 (2H), 7.44 (2H), 7.41 (2H), 7.38 (1H), 7.32 (6H), 7.23 (6H), 7.22 (3H), 7.19 (2H), 6.52 (6H)

APCI-MS (m/s): 715.29[M+]

<Step 4> Synthesis of Compound 2

7.18 g of Compound 1D, 2.10 g of phenylboronic acid, 1.14 g of Pd(PPh₃)₄, 3.55 g of potassium carbonate, 150 ml of toluene, and 60 ml of water were mixed in a 300 ml 3-neck flask in an argon atmosphere and stirred at 90° C. for 8 hours.

[Synthesis Example 2] Synthesis of Compound 3

Compound 3 was synthesized according to Reaction Scheme 1-(2):

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<Step 1> Synthesis of Compound 2B

50.0 g of dibenzofuran-4-boronic acid (Compound 2A), 57.7 g of iodobenzene, 13.6 g of Pd(PPh₃)₄, 50.0 g of Na₂CO₃, 600 ml of toluene, 150 ml of water, and 60 ml of EtOH were mixed in an argon atmosphere and stirred at 80° C. for 2 hours.

After the reaction was completed, an organic layer was extracted therefrom, and the organic layer was dried with MgSO₄and distilled. The resultant was then purified through a column chromatography (with a mixture solvent of CHCl₃/hexane=0:1→1:3) to obtain 45.5 g of Compound 2B (yield 55%) as colorless liquid.

<Step 2> Synthesis of Compound 2C

45.5 g of Compound 2B was dissolved in 300 ml of dehydrated THF in an argon atmosphere, and the solution was cooled to a temperature of −78° C. by using an acetone-dry ice bath. While stirring the solution, 140 ml of 1.6 M n-BuLi was dropwise added to the solution, and a temperature of the solution as slowly increased to room temperature. The solution was stirred at room temperature for 2 hours and cooled to −78° C., and then 32 ml of B(OMe)₃was added thereto. Next, a temperature of the solution was increased to room temperature, and the solution was stirred for 1 hour.

300 ml of saturated NH₄Cl was added thereto to complete the reaction, and 3×100 ml of CH₂Cl₂was used to extract an organic layer from the solution. The organic layer was dried with MgSO₄and distilled to obtain 54 g of Compound 2C.

<Step 3> Synthesis of Compound 2D

Compound 2C obtained from step 2 was not further purified and used in the next reaction.

54 g of Compound 2C, 53.0 g of 1-bromo-3-iodobenzene, 10.8 g of Pd(PPh₃)₄, 39.7 g of Na₂CO₃, 500 ml of toluene, 200 ml of water, and 100 ml of EtOH were mixed in an argon atmosphere and stirred at 80° C. for 2 hours.

After the reaction was completed, an organic layer was extracted therefrom, and the organic layer was dried with MgSO₄and distilled. The resultant was then purified through a column chromatography (with a mixture solvent of toluene/hexane=0:1→1:3) to obtain 51.8 g of Compound 2D as white solid.

<Step 4> Synthesis of Compound 2E

30.0 g of Compound 2D, 16.5 g of 4-aminophenylboronic acid pinacol ester, 4.34 g of Pd(PPh₃)₄, 31.9 g of K₃PO₄, 380 ml of toluene, 200 ml of water, and 100 ml of EtOH were mixed and stirred at 80° C. for 5 hours.

After the reaction was completed, an organic layer was extracted therefrom, and the organic layer was dried with MgSO₄and distilled. The resultant was then purified through a column chromatography (with a mixture solvent of toluene/EtOAc=0:1→50:1) and recrystallized with a mixture solvent of toluene/hexane to obtain 27.7 g of Compound 2E as light-yellow solid.

<Step 5> Synthesis of Compound 2F

27.7 g of Compound 1E, 14.3 g of 4-bromobiphenyl, 1.75 g of Pd(dba)₂, 2.45 g of P(tBu)₃, 8.76 g of NaO(tBu), and 300 ml of toluene were mixed in an argon atmosphere, vacuum-degassed, and stirred while performing reflux thereon for 1 hour.

When the reaction was completed, the mixture was filtered through a filter of Florisil (75 to 150 μm (100 to 200 mesh), available from WAKO), and the solvent was distilled. Then, the resultant was purified through a column chromatography (with a mixture solvent of toluene/hexane=4:6→6:4), and re-crystallized with a mixture solvent of toluene and hexane to obtain 17.45 g of Compound 2F as white solid.

<Step 6> Synthesis of Compound 3

4.0 g of Compound 2F, 2.0 g of 1-(4-bromophenyl)naphthalene, 0.2 g of Pd(dba)₂, 0.25 g of P(tBu)₃, 1.02 g of NaO(tBu), and 60 ml of toluene were mixed in an argon atmosphere, vacuum-degassed, and stirred while performing reflux thereon for 1 hour.

When the reaction was completed, the mixture was filtered through a filter of Florisil (75 to 150 μm (100 to 200 mesh), available from WAKO), and the solvent was distilled. Then, the resultant was re-crystallized with a mixture solvent of toluene and hexane to obtain 5.1 g of Compound 3 as white solid.

¹H NMR: 7.70 (1H), 7.67 (2H), 7.63 (1H), 7.54 (1H), 7.48 (4H), 7.45 (2H), 7.44 (2H), 7.41 (2H), 7.38 (2H), 7.32 (6H), 7.23 (6H), 7.22 (2H), 7.19 (2H), 6.52 (6H)

APCI-MS (m/s): 765.30[M+]

[Synthesis Example 3] Synthesis of Compound 4

Compound 4 was synthesized according to Reaction Scheme 1-(3):

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Compound 2F prepared in step 4 of Synthesis Example 2 was used to synthesize Compound 4.

4.0 g of Compound 2F, 2.0 g of 1-(4-bromophenyl)naphthalene, 0.2 g of Pd(dba)₂, 0.25 g of P(tBu)₃, 1.02 g of NaO(tBu), and 70 ml of toluene were mixed in an argon atmosphere, vacuum-degassed, and stirred while performing reflux thereon for 2 hours.

When the reaction was completed, the mixture was filtered through a filter of Florisil (75 to 150 μm (100 to 200 mesh), available from WAKO), and the solvent was distilled. Then, the resultant was re-crystallized with a mixture solvent of toluene and hexane to obtain 5.2 g of Compound 4 as white solid.

¹H NMR: 7.89 (1H), 7.73 (1H), 7.70 (1H), 7.67 (2H), 7.54 (1H), 7.48 (4H), 7.45 (2H), 7.44 (2H), 7.41 (2H), 7.38 (1H), 7.32 (6H), 7.23 (6H), 7.22 (2H), 7.19 (2H), 6.52 (6H)

APCI-MS (m/s): 765.30[M+]

[Synthesis Example 4] Synthesis of Compound 8

Compound 8 was synthesized according to Reaction Scheme 1-(4):

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6.0 g of Compound 4A, 2.3 g of Compound 2C prepared in Synthesis Example 2, 0.87 g of Pd(PPh₃)₄, 3.0 g of K₂CO₃, 100 ml of toluene, 10 ml of EtOH, and 10 ml of H₂O were mixed in a 300 ml flask in an argon atmosphere and stirred at 90° C. for 6.5 hours.

When the reaction was completed, an organic layer was extracted with AcOEt, the organic layer was dried with MgSO₄, and the solvent was distilled. Then, the resultant was purified through a column chromatography (with a mixture solvent of CH₂Cl₂/hexane=1/4) to obtain 5.78 g of Compound 8 (yield 75%) as white solid.

¹H NMR: 7.54 (4H), 7.48 (6H), 7.45 (2H), 7.41 (2H), 7.32 (6H), 7.23 (6H), 7.22 (3H), 7.19 (2H), 6.52 (6H)

APCI-MS (m/s): 715.29[M+]

[Synthesis Example 5] Synthesis of Compound 55

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Compound 55 (yield 65%) was prepared in the same manner as in Synthesis Example 3, except that 1-bromonaphthalene was used instead of 4-bromobiphenyl in the synthesis of Compound 2F.

Mass: calc. 739.9 found. [M+H⁺] 740.29.

[Synthesis Example 6] Synthesis of Compound 56

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Compound 56 (yield 53%) was prepared in the same manner used in the synthesis of Compound 2F and Compound 3 in Synthesis Example 2, except that Compound 56E was used instead of Compound 2E in the synthesis of Compound 2F.

Mass: calc. 689.84 found. [M+H⁺] 690.28.

[Synthesis Example 7] Synthesis of Compound 57

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Compound 57 (yield 45%) was obtained in the same manner as used in the synthesis of Compound 2F and Compound 3 in Synthesis Example 2, except that Compound 56E was used instead of Compound 2E, and 1-bromonaphthalene was used instead of 4-bromobiphenyl, in the synthesis of Compound 2F.

Mass: calc. 663.8 found. [M+H⁺] 664.26.

Example 1

An indium tin oxide (ITO) glass substrate available from Corning (an anode) at a thickness of 15 Ω/cm²(1200 Å) was cut to a size of 50 mm×50 mm×0.7 mm, sonicated in isopropyl alcohol and pure water for 5 minutes each, and then, cleaned with UV and ozone for 30 minutes. Then, the ITO glass substrate was placed in a vacuum deposition device.

4,4′,4″-tris(N-(2-naphthyl)-N-phenyl-amino)-triphenylamine (2-TNATA) was deposited on the ITO glass substrate to form a hole injection layer having a thickness of 600 Å, Compound 105 was deposited on the hole injection layer to form a second layer having a thickness of 300 Å, and Compound 2 was deposited on the second layer to form a first layer having a thickness of 50 Å, thereby completing formation of a hole transport region.

CBP, as a host, and F₂Irpic, as a dopant, were co-deposited on the hole transport region at a weight ratio of about 95:5 to form an emission layer having a thickness of 20 nm.

Compound ET1 was vacuum-deposited on the emission layer to form an electron transport layer having a thickness of 300 Å, LiF was deposited on the electron transport layer to form an electron injection layer having a thickness of 10 Å, thereby completing formation of an electron transport region.

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Al was vacuum-deposited on the electron transport region to form a cathode having a thickness of 3000 Å, thereby completing manufacture of an organic light-emitting device.

Examples 2 to 7 and Comparative Examples 1 to 4

Organic light-emitting devices were manufactured in the same manner as in Example 1, except that materials for the first layer and the second layer were changed according to Table 1.

Evaluation Example 1

Driving voltages, luminances, and efficiencies of the organic light-emitting devices prepared in Examples 1 to 7 and Comparative Examples 1 to 4 were measured by using a Keithley SMU 236 and a luminance meter PR650, and the results are shown in Table 1.

TABLE 1

Hole transport region
Driving

Effi-

First
Second
voltage
Luminance
ciency

layer
layer
(V)
(cd/m²)
(cd/A)

Exam-
Com-
Com-
4.4
805
7.5

ple 1
pound 2
pound 105

Exam-
Com-
Com-
4.3
722
7.6

ple 2
pound 3
pound 105

Exam-
Com-
Com-
4.1
519
5.4

ple 3
pound 4
pound 105

Exam-
Com-
Com-
4.3
642
6.1

ple 4
pound 8
pound 105

Exam-
Com-
Com-
4.3
734
7.1

ple 5
pound 55
pound 105

Exam-
Com-
Com-
4.1
605
6.2

ple 6
pound 56
pound 105

Exam-
Com-
Com-
4.2
830
8.7

ple 7
pound 57
pound 105

Compar-
Com-
TPD
5.0
324
4.8

ative
pound 2

Exam-

ple 1

Compar-
NPB
Com-
4.8
213
3.7.

ative

pound 105

Exam-

ple 2

Compar-
Com-
TPD
4.6
426
5.1

ative
pound 8

Exam-

ple 3

Compar-
NPB
TPD
4.7
457
4.8

ative

Exam-

ple 4

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Referring to Table 1, it may be confirmed that driving voltages, luminances, and efficiencies of the organic light-emitting devices prepared in Examples 1 to 7 are better than those of the organic light-emitting devices prepared in Comparative Examples 1 to 4.

By way of summation and review, an organic light-emitting device may include a first electrode, a hole transport region, an emission layer, an electron transport region, and a second electrode, which are sequentially formed on a substrate in the stated order. Holes provided from the first electrode may move to the emission layer through the hole transport region, and electrons provided from the second electrode may move to the emission layer through the electron transport region. The holes and the electrons are recombined in the emission layer to produce excitons. These excitons change from an excited state to a ground state to thereby generate light.

As described above, embodiments may provide an organic light-emitting device operating at a low driving voltage and having a high efficiency and long lifespan.

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.

Claims

1. An organic light-emitting device comprising: a first electrode;a second electrode facing the first electrode;an emission layer disposed between the first electrode and the second electrode; anda hole transport region disposed between the first electrode and the emission layer,wherein the hole transport region includes a first compound represented by Formula 1 and a second compound represented by Formula 2, and the first compound and the second compound are different from each other:
2. The organic light-emitting device as claimed in claim 1, wherein in Formula 1 X1 is N and Y1 is O.
3. The organic light-emitting device as claimed in claim 1, wherein in Formula 2 X11 is N.
4. The organic light-emitting device as claimed in claim 1, wherein in Formula 2, L1 and L11 to L14 are each independently selected froma phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an indacenylene group, an acenaphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenalenylene group, a phenanthrenylene group, an anthracenylene group, a fluoranthenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a naphthacenylene group, a picenylene group, a perylenylene group, a pentaphenylene group, a hexacenylene group, a pentacenylene group, a rubicenylene group, a coronenylene group, an ovalenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyrazolylene group, a thiazolylene group, an isothiazolylene group, an oxazolylene group, an isoxazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an isoindolylene group, an indolylene group, an indazolylene group, a purinylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phthalazinylene group, a naphthyridinylene group, a quinoxalinylene group, a quinazolinylene group, a cinnolinylene group, a carbazolylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a phenazinylene group, a benzoimidazolylene group, a benzofuranylene group, a benzothiophenylene group, an isobenzothiazolylene group, a benzoxazolylene group, an isobenzoxazolylene group, a triazolylene group, a tetrazolylene group, an oxadiazolylene group, a triazinylene group, a dibenzofuranylene group, a dibenzothiophenylene group, a benzocarbazolylene group, a dibenzocarbazolylene group a thiadiazolylene group, an imidazopyridinylene group, and an imidazopyrimidinylene group; anda phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an indacenylene group, an acenaphthylene group, a fluorenylene group, a Spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenalenylene group, a phenanthrenylene group, an anthracenylene group, a fluoranthenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a naphthacenylene group, a picenylene group, a perylenylene group, a pentaphenylene group, a hexacenylene group, a pentacenylene group, a rubicenylene group, a coronenylene group, an ovalenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyrazolylene group, a thiazolylene group, an isothiazolylene group, an oxazolylene group, an isoxazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an isoindolylene group, an indolylene group, an indazolylene group, a purinylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phthalazinylene group, a naphthyridinylene group, a quinoxalinylene group, a quinazolinylene group, a cinnolinylene group, a carbazolylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a phenazinylene group, a benzoimidazolylene group, a benzofuranylene group, a benzothiophenylene group, an isobenzothiazolylene group, a benzoxazolylene group, an isobenzoxazolylene group, a triazolylene group, a tetrazolylene group, an oxadiazolylene group, a triazinylene group, a dibenzofuranylene group, a dibenzothiophenylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a thiadiazolylene group, an imidazopyridinylene group, and an hnidazopyrimidinylene group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group, or a salt thereof, a sulfonic acid group, or a salt thereof, a phosphoric acid group, or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a biphenyl group, a terphenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl 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 phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, a thiadiazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, and —Si(Q31)(Q32)(Q33),wherein Q31 to Q33 are each independently selected from a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, and a carbazolyl group.
5. The organic light-emitting device as claimed in claim 1, wherein in Formulae 1 and 2 a1 and a11 to a14 are each independently an integer selected from 0 to 5 andL1 and L11 to L14 are each independently selected from groups represented by Formulae 3-1 to 3-74:
6. The organic light-emitting device as claimed in claim 5, wherein in Formulae 1 and 2, Ar11 and Ar12 are each independently selected from groups represented by Formulae 5-1 to 5-89:
7. The organic light-emitting device as claimed in claim 5, wherein in Formula 2, Ar11 and Ar12 are each independently selected from groups represented by Formulae 6-1 to 6-7 and 6-9 to 6-144:
8. The organic light-emitting device as claimed in claim 1, wherein in Formula 1, a1 is an integer selected from 1 to 3.
9. The organic light-emitting device as claimed in claim 1, wherein in Formula 1, *-(L1)a1-*′ is selected from groups represented by Formulae 4-1 to 4-29:
10. The organic light-emitting device as claimed in claim 1, wherein in Formula 1, a1, a2, and a3 satisfy: a1=1, a2=0, and a3=0;a1=1, a2=1, and a3=0;a1=1, a2=0, and a3=1;a1=1, a2=1, and a3=1;a1=2, a2=0, and a3=0;a1=2, a2=1, and a3=0;a1=2, a2=0, and a3=1; ora1=2, a2=1, and a3=1.
11. The organic light-emitting device as claimed in claim 1 wherein, in Formula 2, a11a12and a13 satisfy: a11=0, a12=0, and a13=0;a11=1, a12=0, and a13=0;a11=0, a12=1, and a13=0;a11=0, a12=0, and a13=1;a11=1, a12=1, and a13=0;a11=1, a12=0, and a13=1;a11=0, a12=1, and a13=1; ora11=1, a12=1, and a13=1.
12. The organic light-emitting device as claimed in claim 1, wherein in Formula 2, Ar11 and Ar12 are each independently selected froma phenyl group, a biphenyl group, a terphenyl group, a pentalenyl group, an indenyl group a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl 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 phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, a thiadiazolyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group; anda phenyl group, a biphenyl group, a terphenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an-azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a Spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl 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 phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, a thiadiazolyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group, or a salt thereof, a sulfonic acid group, or a salt thereof, a phosphoric acid group, or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a biphenyl group, a terphenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl 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 phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, a thiadiazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, and —Si(Q31)(Q32)(Q33),wherein Q31 to Q33 are each independently selected from a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, and a carbazolyl group.
13. The organic light-emitting device as claimed in claim 1 wherein in Formulae 1 and 2, R1, R2, and R11 to R14 are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group, or a salt thereof, a sulfonic acid group, or a salt thereof, a phosphoric acid group, or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, aa carbazolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, and —Si(Q1)(Q2)(Q3), wherein Q1 to Q3 are each independently selected from a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, and a carbazolyl group.
14. The organic light-emitting device as claimed in claim 1, wherein, in Formulae 1 and 2 R3, R21, and R22 are each independently selected from a C1-C20 alkyl group, and a C1-C20 alkoxy group;a C1-C20 alkyl group, and a C1-C20 alkoxy group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group, or a salt thereof, a phosphoric acid group, or a salt thereof, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a pyridinyl group, and a pyrimidinyl group;a phenoxy group, a phenylthio group, a phenyl group, a biphenyl group, a terphenyl 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 benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, and an imidazopyrimidinyl group; anda phenoxy group, a phenylthio group, a phenyl group, a biphenyl group, a terphenyl 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 benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, and an imidazopyrimidinyl group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group, or a salt thereof, a sulfonic acid group, or a salt thereof, a phosphoric acid group, or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a biphenyl group, a terphenyl 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 benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl 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, and —Si(Q31)(Q32)(Q33),wherein Q31 to Q33 are each independently selected from a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, and a carbazolyl group.
15. The organic light-emitting device as claimed in claim 1 wherein the first compound is represented by one of Formulae 1AA to 1LD:
16. The organic light-emitting device as claimed in claim 1, wherein the first compound is represented by one of Formulae 1AA-1 to 1LD-4:
17. The organic light-emitting device as claimed in claim 1 wherein the second compound is represented by Formula 2A:
18. The organic light-emitting device as claimed in claim 1, wherein-the first compound is selected from Compounds of the following Group A, and the second compound is selected from Compounds of the following Group B:
19. The organic light-emitting device as claimed in claim 1, wherein the hole transport region includes a first layer and a second layer,the first layer includes the first compound,the second layer includes the second compound,the first layer is disposed between the first electrode and the emission layer, andthe second layer is disposed between the first electrode and the first layer.
20. The organic light-emitting device as claimed in claim 19, wherein the first layer and the second layer are in direct contact, and the first layer and the emission layer are in direct contact.
21. The organic light-emitting device as claimed in claim 1, wherein the emission layer is a blue emission layer that emits blue light.
22. An organic light-emitting device, comprising: a substrate including a first sub-pixel, a second sub-pixel, and a third sub-pixel:a plurality of first electrodes formed according to the first sub-pixel, the second sub-pixel, and the third sub-pixel of the substrate;a second electrode facing the first electrodes;an emission layer that is disposed between the first electrode electrodes and the second electrode and includes a first emission layer, which is disposed between the first electrode and the second electrode of the first sub-pixel and emits first color light a second emission layer, which is disposed between the first electrode and the second electrode of the second sub-pixel and emits second color light, and a third emission layer, which is disposed between the first electrode and the second electrode of the third sub-pixel and emits third color light; anda hole transport region disposed between the first electrodes and the emission layer,wherein the first color light is red light, the second color light is green light, and the third color light is blue light,the hole transport region includesa first layer disposed between the first electrodes and the emission layer; anda second layer disposed between the first electrodes and the first layer,wherein the first layer is disposed between the first electrode of the third sub-pixel and the third emission layer but is not formed on emission regions of the first sub-pixel and the second sub-pixel,the first layer includes a first compound represented by Formula 1,the second layer includes a second compound represented by Formula 2, andthe first compound and the second compound are different from each other:
23. The organic light-emitting device as claimed in claim 22, wherein the second layer is a common layer with respect to all of the first sub-pixel, the second sub-pixel, and the third sub-pixel.

Priority Claims (1)

Number	Date	Country	Kind
10-2015-0118281	Aug 2015	KR	national

US Referenced Citations (4)

Number	Name	Date	Kind
20030146695	Seki	Aug 2003	A1
20100001636	Yabunouchi	Jan 2010	A1
20120146014	Kato	Jun 2012	A1
20150014645	Park et al.	Jan 2015	A1

Foreign Referenced Citations (4)

Number	Date	Country
10-2011-0011647	Feb 2011	KR
10-2012-0052993	May 2012	KR
10-2014-0061241	May 2014	KR
10-2015-0006694	Jan 2015	KR

Related Publications (1)

	Number	Date	Country
	20170062727 A1	Mar 2017	US

Organic light-emitting device

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