# US 12,193,322 B2 · Organic light-emitting devices

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- Number: US 12,193,322 B2
- Document ID: US12193322B2
- Status: Granted
- Kind: B2
- Application number: 17/099,679
- Filed: 2020-11-16
- Published: 2021-03-11
- Granted: 2025-01-07
- Earliest claimed: 2013-06-14
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Hwan-Hee Cho; Mi-Kyung Kim; Se-Hun Kim; Dong-Hyun Kim; Chang-Woong Chu
- Web page: https://patentgrep.com/patent/US12193322B2

## CPC

- H10K 85/636: {comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom}
- C09K 11/02: Use of particular materials as binders, particle coatings or suspension media therefor
- C09K 11/06: containing organic luminescent materials
- H10K 85/342: {comprising iridium}
- H10K 85/633: {comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom}
- H10K 85/654: {comprising only nitrogen as heteroatom (H10K85/652 takes precedence)}
- H10K 85/6572: {comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole}
- H10K 85/6574: {comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes}
- C09K 2211/1007: Non-condensed systems
- C09K 2211/1029: containing one nitrogen atom as the heteroatom
- C09K 2211/185: of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
- H10K 50/11: characterised by the electroluminescent [EL] layers
- H10K 50/13: comprising stacked EL layers within one EL unit
- H10K 50/15: Hole transporting layers
- H10K 85/615: {Polycyclic condensed aromatic hydrocarbons, e.g. anthracene}
- H10K 85/626: {containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene}
- H10K 85/631: {Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine}
- H10K 2101/10: Triplet emission
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

An organic light-emitting device includes: a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode. The organic layer includes an emission layer, and the emission layer includes at least one light-emitting material represented by one of Formulas 1 and 2. The organic layer further includes at least one hole-transporting material represented by one of Formulas 2(1) and 2(2).

## Claims

### Claim 1

An organic light-emitting device, comprising:
a substrate comprising a first sub-pixel region, a second sub-pixel region, and a third sub-pixel region;
a first sub-pixel electrode disposed in the first sub-pixel region of the substrate,
a first buffer layer disposed on the first sub-pixel electrode,
a first emission layer disposed on the first buffer layer,
a second sub-pixel electrode disposed in the second sub-pixel region of the substrate,
a second buffer layer disposed on the second sub-pixel electrode,
a second emission layer disposed on the second buffer layer,
a third sub-pixel electrode disposed in the third sub-pixel region of the substrate,
a third emission layer disposed on the third sub-pixel electrode, and
a second electrode disposed opposite to the first sub-pixel electrode, the second sub-pixel electrode, and the third sub-pixel electrode,
wherein the first emission layer emits a red color light, the second emission layer emits a green color light, and the third emission layer emits a blue color light, and only one of conditions (i) and (ii) below is met:
(i) the first emission layer comprises at least one light-emitting material represented by any one of Formulas 1 and 2, and
the second buffer layer consists of the at least one hole-transporting material represented by Formula 2(2), or
(ii) the second emission layer comprises at least one light-emitting material represented by any one of the Formulas 1 and 2, and
the first buffer layer consists of the at least one hole-transporting material represented by the Formula 2(2):
wherein, in the Formulae 1 and 2,
A1 is CR1 or N; A2 is CR2 or N; As is CR3 or N; A4 is CR4 or N; As is CR5 or N; A6 is CR6 or N; A7 is CR7 or N; As is CR8 or N; A9 is CR9 or N; A10 is CR10 or N; An is CR11 or N; A12 is CR12 or N; A13 is CR13 or N; A14 is CR14 or N; A15 is CR15 or N; and A16 is CR16 or N;
R1 to R16 are each independently selected from the group consisting of a hydrogen atom, a deuterium atom, a halogen atom, a C1-C60 alkyl group, a C6-C60 aryl group, a C1-C60 heteroaryl group, and —N(Q1)(Q2)(Q3), Q1 to Q3 are each independently a C1-C60 alkyl group, a C6-C60 aryl group, or a C1-C60 heteroaryl group; or two or more of R1 to R16 are optionally connected to each other to form a C6-C20 saturated ring or a Co-C20 unsaturated ring;
Y is O, S, or C(R31)(R32);
L1 to L3 are each independently selected from the group consisting of a substituted or unsubstituted C3-C10 cycloalkylene group, a substituted or unsubstituted C3-C10 cycloalkenylene group, a substituted or unsubstituted C6-C60 arylene group, a substituted or unsubstituted C1-C10 heterocycloalkylene group, a substituted or unsubstituted C1-C10 heterocycloalkenylene group, and a substituted or unsubstituted C1-C60 heteroarylene group;
n1 to n3 are each independently an integer of 0 to 3;
Ar1 to Ar3 are each independently selected from the group consisting of:
i) a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C1-C60 heteroaryl group, and —Si(Q1)(Q2)(Q3) (here, Q1 to Q3 are each independently a substituted or unsubstituted C1-C10 alkyl group or a substituted or unsubstituted C6-C30 aryl group); and
ii) a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, and a C1-C60 heteroaryl group, each substituted with at least one substituent selected from the group consisting of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, and
—Si(Q1)(Q2)(Q3) (here, Q1 to Q3 are each independently a substituted or unsubstituted C1-C10 alkyl group or a substituted or unsubstituted C6-C30 aryl group);
Z1 to Z4, R31, and R32 are each independently selected from the group consisting of:
i) a hydrogen atom, a deuterium atom, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group;
ii) a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group, each substituted with at least one substituent selected from the group consisting of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine, a hydrazone, a carboxyl group or a salt thereof, a sulfonic acid or a salt thereof, and a phosphoric acid or a salt thereof, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, and a C1-C60 heteroaryl group;
iii) a C3-C10 cycloalkyl group, C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, and a C1-C60 heteroaryl group; and
iv) a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, and a C1-C60 heteroaryl group, each substituted with at least one substituent selected from the group consisting of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, and a C1-C60 heteroaryl group; o1 to o4 are each independently an integer of 0 to 3;
wherein, in the Formula 2(2),
X11 is CR11 or N; X12 is CR12 or N; X13 is CR13 or N; X14 is CR14 or N; X15 is CR15 or N; X16 is CR16 or N; X17 is CR17 or N; X18 is CR18 or N; X19 is CR19 or N; X20 is CR20 or N; X21 is CR21 or N; X22 is CR22 or N; X23 is CR23 or N; and X24 is CR24 or N;
Z5, Z6, and R11 to R24 are each independently selected from the group consisting of:
i) a hydrogen atom, a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group;
ii) a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group, each substituted with at least one substituent selected from the group consisting of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, and a C1-C60 heteroaryl group;
iii) a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, and a C1-C60 heteroaryl group;
iv) a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, and a C1-C60 heteroaryl group, each substituted with at least one substituent selected from the group consisting of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, and a C1-C60 heteroaryl group; and
v) —N(Q11)(Q12), —Si(Q13)(Q14)(Q15), and —B(Q16)(Q17) (here, Q11 and Q17 are each independently a C1-C60 alkyl group, a C1-C60 alkoxy group, a C6-C60 aryl group, or a C2-C60 heteroaryl group);
Ar13 and Ar14 are each independently selected from the group consisting of:
i) a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, and a C1-C60 heteroaryl group; and
ii) a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, and a C1-C60 heteroaryl group, each substituted with at least one substituent selected from the group consisting of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a Cs-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, and a C1-C60 heteroaryl group; Z11 and Z12 are connected to each other to form a fluorene moiety; and p and q are each independently an integer from 1 to 4.

### Claim 2 (depends on 1)

The organic light-emitting device of claim 1, wherein the light emitting material of any one of the Formulas 1 and 2 is represented by any one of Formulas 1-1 to 1-24 below:
wherein, in the Formulas 1-1 to 1-24:
Y is O, S, or C(R31)(R32);
L1 to L3 are each independently selected from the group consisting of a substituted or unsubstituted C3-C10 cycloalkylene group, a substituted or unsubstituted C3-C10 cycloalkenylene group, a substituted or unsubstituted C6-C60 arylene group, a substituted or unsubstituted C1-C10 heterocycloalkylene group, a substituted or unsubstituted C1-C10 heterocycloalkenylene group, and a substituted or unsubstituted C1-C60 heteroarylene group;
n1 to n3 are each independently an integer of 0 to 3;
Ar1 to Ar3 are each independently selected from the group consisting of:
i) a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, and a C1-C60 heteroaryl group; and
ii) a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, C6-C60 aryl group, and a C1-C60 heteroaryl group, each substituted with at least one substituent selected from the group consisting of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, and a C1-C60 heteroaryl group; R31 and R32 are each independently selected from the group consisting of:
i) a hydrogen atom, a deuterium atom, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group;
ii) a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group, each substituted with at least one substituent selected from the group consisting of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, and a C1-C60 heteroaryl group;
iii) a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, and a C1-C60 heteroaryl group; and
iv) a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, and a C1-C60 heteroaryl group, each substituted with at least one substituent selected from the group consisting of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, C6-C60 arylthio group, and a C1-C60 heteroaryl group.

### Claim 3 (depends on 1)

The organic light-emitting device of claim 1, wherein:
Ar1 to Ar3 are each independently selected from the group consisting of:
i) a C6-C60 aryl group, a C1-C60 heteroaryl group, and —Si(Q1)(Q2)(Q3) (here, Q1 to Q3 are each independently a C1-C10 alkyl group or a C6-C30 aryl group); and
ii) a C6-C60 aryl group and a C1-C60 heteroaryl group, each substituted with at least one substituent selected from the group consisting of a deuterium atom, a halogen atom, a C1-C60 alkyl group, a C6-C60 aryl group, a C1-C60 heteroaryl group, and —Si(Q1)(Q2)(Q3) (here, Q1 to Q3 are each independently a C1-C10 alkyl group or a C6-C30 aryl group).

### Claim 4 (depends on 1)

The organic light-emitting device of claim 1, wherein:
X11 is C(R11), X12 is C(R12), X13 is C(R13), X14 is C(R14), X15 is C(R15), X16 is C(R16), X17 is C(R17), X18 is C(R18), X19 is C(R19), X20 is C(R20), X21 is C(R21), X22 is C(R22), X23 is C(R23), and X24 is C(R24).

### Claim 5 (depends on 1)

The organic light-emitting device of claim 1, wherein:
Ar13 and Ar14 are each independently selected from the group consisting of:
i) a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a phenanthrenyl group, an anthryl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, a quinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, and a triazinyl group; and
ii) a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a phenanthrenyl group, an anthryl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, a quinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, and a triazinyl group, each substituted with at least one substituent selected from the group consisting of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl 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 naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a phenanthrenyl group, an anthryl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, a quinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, and a triazinyl group.

### Claim 6 (depends on 1)

The organic light-emitting device of claim 1, wherein:
Z5, Z6, and R11 to R24 may each independently be a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, or a moiety represented by one of Formulas 3-1 to 3-20:
wherein, in the Formulas 3-1 to 3-20:
* represents a carbon atom of a fluorene-based ring of the Formula 2(2).

### Claim 7 (depends on 1)

The organic light-emitting device of claim 1, wherein:
the hole-transporting material is at least one of Compounds 6-89 to 6-96, 6-113 to 6-120, and 6-137 to 6-144:

### Claim 8 (depends on 1)

The organic light-emitting device of claim 1, wherein
the second emission layer comprises the at least one light emitting material represented by any one of the Formulas 1 and 2,
the first buffer layer consists of the at least one hole-transporting material represented by the Formula 2(2), and
the second buffer layer comprises at least one compound represented by Formula 300 or 301:
wherein in the Formula 300 and the Formula 301, Ar101 and Ar102 may each independently be a substituted or unsubstituted C6-C60 arylene group,
xa and xb may each independently be an integer of 0 to 5,
R101 to R108, R111 to R119, and R121 to R124 may each independently be a hydrogen atom, a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl 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-C60 alkyl group, a substituted or unsubstituted C2-C60 alkenyl group, a substituted or unsubstituted C2-C60 alkynyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C3-C60 cycloalkyl group, a substituted or unsubstituted C5-C60 aryl group, a substituted or unsubstituted C5-C60 aryloxy group, or a substituted or unsubstituted C5-C60 arylthio group,
R51 to R58, R61 to R69, R71, and R72 may each independently be a hydrogen atom; a deuterium atom; a halogen atom; a hydroxyl group; a cyano group; a nitro group; an amino group; an amidino group; a hydrazine group; a hydrazone group; a carboxyl group or a salt thereof; a sulfonic acid group or a salt thereof; a phosphoric acid group or a salt thereof; a C1-C10 alkyl group; a C1-C10 alkoxy group; a C1-C10 alkyl group or a C1-C10 alkoxy group substituted with at least one of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl 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 naphthyl group; an anthryl group; a fluorenyl group; a pyrenyl group; a phenyl group, a naphthyl group, an anthryl group, a fluorenyl group, or a pyrenyl group substituted with at least one of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C10 alkyl group, or a C1-C10 alkoxy group, and
R109 is:
a phenyl group; a naphthyl group; an anthryl group; a biphenyl group; or a pyridinyl group; or
a phenyl group, a naphthyl group, an anthryl group, a biphenyl group, or a pyridinyl group, each substituted with at least one of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl 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-C20 alkyl group, or a substituted or unsubstituted C1-C20 alkoxy group.

### Claim 9 (depends on 8)

The organic light-emitting device of claim 8, wherein
the second buffer layer comprises at least one of Compounds 301 to 320:

### Claim 10 (depends on 1)

The organic light-emitting device of claim 1, wherein
the organic light-emitting device further comprises a hole transport layer disposed immediately above the first, second, and third sub-pixel electrodes and below the first and second buffer layers.

### Claim 11 (depends on 10)

The organic light-emitting device of claim 10, wherein
the hole transport layer includes at least one compound represented by one of Formula 300 and Formula 301:
wherein in the Formula 300 and the Formula 301,
Ar101 and Ar102 may each independently be a substituted or unsubstituted C6-C60 arylene group,
xa and xb may each independently be an integer of 0 to 5,
R101 to R108, R111 to R119, and R121 to R124 may each independently be a hydrogen atom, a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl 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-C60 alkyl group, a substituted or unsubstituted C2-C60 alkenyl group, a substituted or unsubstituted C2-C60 alkynyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C3-C60 cycloalkyl group, a substituted or unsubstituted C5-C60 aryl group, a substituted or unsubstituted C5-C60 aryloxy group, or a substituted or unsubstituted C5-C60 arylthio group, and
R109 is:
a phenyl group; a naphthyl group; an anthryl group; a biphenyl group; or a pyridinyl group; or
a phenyl group, a naphthyl group, an anthryl group, a biphenyl group, or a pyridinyl group, each substituted with at least one of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl 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-C20 alkyl group, or a substituted or unsubstituted C1-C20 alkoxy group.

### Claim 12 (depends on 10)

The organic light-emitting device of claim 10, wherein:
the hole transport layer includes at least one of Compounds 301 to 320:

### Claim 13 (depends on 11)

The organic light-emitting device of claim 11, wherein the second emission layer comprises the at least one light emitting material represented by any one of the Formulas 1 and 2,
the first buffer layer consists of the at least one hole-transporting material represented by the Formula 2(2),
the second buffer layer comprises at least one compound represented by the Formula 300 or 301, and
the second buffer layer and the hole transport layer include the same compound.