# US 12,004,416 B2 · Organometallic compound and organic light-emitting device including the same

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- Number: US 12,004,416 B2
- Document ID: US12004416B2
- Status: Granted
- Kind: B2
- Application number: 17/195,743
- Filed: 2021-03-09
- Published: 2022-03-03
- Granted: 2024-06-04
- Earliest claimed: 2020-08-31
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Ohyun Kwon; Virendra Kumar Rai; Bumwoo Park; Sangdong Kim; Hyungjun Kim; Myungsun Sim; Byoungki Choi
- Web page: https://patentgrep.com/patent/US12004416B2

## CPC

- H10K 85/342: {comprising iridium}
- C07F 15/0033: {Iridium compounds}
- C09K 11/06: containing organic luminescent materials
- C09K 2211/1029: containing one nitrogen atom as the heteroatom
- C09K 2211/1033: with oxygen
- 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 2101/10: Triplet emission
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

Provided are an organometallic compound represented by Formula 1 and an organic light-emitting device including the same: M1(Ln1)n1(Ln2)3-n1 Formula 1 wherein, in Formula 1, Ln2 is a ligand represented by Formula 1A, and other substituents are the same as described in the detailed description of the present specification:

## Claims

### Claim 1

An organometallic compound represented by Formula 1:
M1(Ln1)n1(Ln2)3-n1 Formula 1
wherein, in Formulae 1 and 1A,
M1 is a first-row transition metal of the Periodic Table of Elements, a second-row transition metal of the Periodic Table of Elements, or a third-row transition metal of the Periodic Table of Elements,
Ln1 is a bidentate ligand,
n1 is 0, 1, or 2,
Ln2 is a ligand represented by Formula 1A,
A1 to A4 are each independently a C5-C30 carbocyclic group or a C1-C30 heterocyclic group,
Y1 is C or N, and Y2 is C or N,
L1 and L2 are each independently a single bond, *—N(R1)—*′, *—O—*′, *—S—*′, *—C(R1)(R2)—*′, *—Si(R1)(R2)—*′, *—Se—*′, *—B(R1)—*′, *—P(R1)—*′, *—Ge(R1)(R2)—*′, *—C(═O)—*′, *—S(═O)—*′, *—S(═O)2—*′, *—C(R1)═C(R2)—*′, *—C(═S)—*′, or *—C≡C—*′,
k1 and k2 are each independently 0, 1, or 2, wherein at least one of k1 and k2 is not 0,
R1, R2, R10, R20, R30, and R40 are each independently hydrogen, deuterium, —F, —Cl, —Br, —I, —SF5, 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-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-C10 cycloalkyl group, a substituted or unsubstituted C1-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, —Si(Q1)(Q2)(Q3), —Ge(Q1)(Q2)(Q3), or —B(Q1)(Q2),
two or more neighboring groups of R1, R2, R10, R20, R30, and R40 are optionally linked together to form a substituted or unsubstituted C5-C30 carbocyclic group or a substituted or unsubstituted C1-C30 heterocyclic group,
b10, b20, b30, and b40 are each independently an integer from 1 to 10,
* and *′ each indicate a binding site to a neighboring atom,
at least one substituent of the substituted C1-C60 alkyl group, the substituted C2-C60 alkenyl group, the substituted C2-C60 alkynyl group, the substituted C1-C60 alkoxy group, the substituted C3-C10 cycloalkyl group, the substituted C1-C10 heterocycloalkyl group, the substituted C3-C10 cycloalkenyl group, the substituted C1-C10 heterocycloalkenyl group, the substituted C6-C60 aryl group, the substituted C6-C60 aryloxy group, the substituted C6-C60 arylthio group, the substituted C1-C60 heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, the substituted monovalent non-aromatic condensed heteropolycyclic group, the substituted C5-C30 carbocyclic group, and the substituted C1-C30 heterocyclic group is:
deuterium, —F, —Cl, —Br, —I, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, or a C1-C60 alkoxy group;
a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, or a C1-C60 alkoxy group, each substituted with at least one deuterium, —F, —Cl, —Br, —I, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, 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, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —Si(Q11)(Q12)(Q13), —Ge(Q11)(Q12)(Q13), —N(Q14)(Q15), —B(Q11)(Q12), or any combination 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, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, or a monovalent non-aromatic condensed heteropolycyclic 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, a monovalent non-aromatic condensed polycyclic group, or a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one deuterium, —F, —Cl, —Br, —I, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid 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, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —Si(Q21)(Q22)(Q23), —Ge(Q21)(Q22)(Q23), —N(Q24)(Q25), —B(Q21)(Q22), or any combination thereof; or
—Si(Q31)(Q32)(Q33), —Ge(Q31)(Q32)(Q33), —N(Q34)(Q35), or —B(Q31)(Q32), and
Q1 to Q3, Q11 to Q15, Q21 to Q25, and Q31 to Q35 are each independently 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 or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid 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-C10 cycloalkyl group, a substituted or unsubstituted C1-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, or a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group.

### Claim 2 (depends on 1)

The organometallic compound of claim 1, wherein
M1 is beryllium (Be), magnesium (Mg), aluminum (Al), calcium (Ca), titanium (Ti), manganese (Mn), cobalt (Co), copper (Cu), zinc (Zn), gallium (Ga), germanium (Ge), zirconium (Zr), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), rhenium (Re), iridium (Ir), osmium (Os), platinum (Pt), or gold (Au).

### Claim 3 (depends on 1)

The organometallic compound of claim 1, wherein
Ln2 is represented by Formula 1A-1 or 1A-2:
wherein, in Formulae 1 A-1 and 1A-2,
A1 to A4, Y1, Y2, L1, L2, k1, k2, R10, R20, R30, R40, b10, b20, b30, and b40 are each the same as described in claim 1,
X1 is C or N, X2 is C or N, X3 is C or N, and X4 is C or N, and
* and *′ each indicate a binding site to a neighboring atom.

### Claim 4 (depends on 1)

The organometallic compound of claim 1, wherein
A1 is a pyridine group, a pyrimidine group, a pyridazine group, a triazine group, a quinoline group, an isoquinoline group, a quinoxaline group, a quinazoline group, a phenanthroline group, a pyrazole group, a triazole group, an imidazole group, an indole group, a benzopyrazole group, or a benzimidazole group.

### Claim 5 (depends on 1)

The organometallic compound of claim 1, wherein
A2 to A4 are each independently a benzene group, a naphthalene group, a 1,2,3,4-tetrahydronaphthalene group, a benzothiophene group, a benzofuran group, an indole group, an indene group, a benzosilole group, a dibenzothiophene group, a dibenzofuran group, a carbazole group, a fluorene group, or a dibenzosilole group.

### Claim 6 (depends on 1)

The organometallic compound of claim 1, wherein
L1 and L2 are each independently a single bond, *—N(R1)—*′, *—O—*′, *—S—*′ or *—C(R1)(R2)—*′.

### Claim 7 (depends on 1)

The organometallic compound of claim 1, wherein
k1 and k2 are each independently 0 or 1.

### Claim 8 (depends on 1)

The organometallic compound of claim 1, wherein
Ln2 is represented by one of Formulae 3-1 to 3-10:
wherein, in Formulae 3-1 to 3-10,
X20 is O, S, N(R28), or C(R28)(R29),
X15 is C(R15) or N, X16 is C(R16) or N, X17 is C(R17) or N, and X18 is C(R18) or N,
X21 is C(R21) or N, X22 is C(R22) or N, X23 is C(R23) or N, X24 is C(R24) or N, X25 is C(R25) or N, X26 is C(R26) or N, and X27 is C(R27) or N,
X31 is C(R31) or N, X32 is C(R32) or N, X33 is C(R33) or N, and X34 is C(R34) or N,
X41 is C(R41) or N, X42 is C(R42) or N, X43 is C(R43) or N, and X44 is C(R44) or N,
R11 to R19 are each independently be the same as described in connection with R10,
R21 to R29 are each independently be the same as described in connection with R20,
R31 to R34 are each independently be the same as described in connection with R30,
R41 to R44 are each independently be the same as described in connection with R40, and
* and *′ each indicate a binding site to a neighboring atom.

### Claim 9 (depends on 1)

The organometallic compound of claim 1, wherein
R1, R2, R10, R20, R30, and R40 are each independently hydrogen, deuterium, —F, a cyano group, a nitro group, —F, —Cl, —Br, —I, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, —Si(Q1)(Q2)(Q3), —Ge(Q1)(Q2)(Q3), or a group represented by one of Formulae 9-1 to 9-43, 9-201 to 9-237, 10-1 to 10-129, and 10-201 to 10-350:
wherein, in Formulae 9-1 to 9-43, 9-201 to 9-237, 10-1 to 10-129, and 10-201 to 10-350, * indicates a binding site to a neighboring atom, Ph is a phenyl group, TMS is a trimethylsilyl group, and TMG is a trimethylgermyl group.

### Claim 10 (depends on 1)

The organometallic compound of claim 1, wherein
Ln1 is represented by one of Formulae 8-1 to 8-12, or is represented by Formula 5:
wherein, in Formula 5,
A5 and A6 are each independently a C5-C30 carbocyclic group or a C1-C30 heterocyclic group,
Y5 is C or N, and Y6 is C or N,
R50 and R60 are each independently hydrogen, deuterium, —F, —Cl, —Br, —I, —SF5, 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-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-C10 cycloalkyl group, a substituted or unsubstituted C1-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, —Si(Q1)(Q2)(Q3), —Ge(Q1)(Q2)(Q3), or —B(Q1)(Q2),
b50 and b60 are each independently an integer from 1 to 10, and
* and *′ each indicate a binding site to a neighboring atom.

### Claim 11 (depends on 1)

The organometallic compound of claim 1, wherein
Ln1 is one of Formulae 5-1 to 5-116:
wherein, in Formulae 5-1 to 5-116,
R51 to R53 are each independently be 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, —SF5, a C1-C20 alkyl group, or a C1-C20 alkoxy group;
a C1-C20 alkyl group or a C1-C20 alkoxy group, each substituted with at least one deuterium, —F, —Cl, —Br, —I, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, 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-C10 alkyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, a bicyclo[2.2.1]heptanyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a phenyl group, a biphenyl group, a C1-C20 alkylphenyl group, a naphthyl group, a pyridinyl group, a pyrimidinyl group, or any combination thereof;
a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, a bicyclo[2.2.1]heptanyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a phenyl group, a biphenyl group, a C1-C20 alkylphenyl group, a naphthyl group, a fluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, 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 dibenzosilolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, or an imidazopyrimidinyl group;
a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, a bicyclo[2.2.1]heptanyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a phenyl group, a biphenyl group, a C1-C20 alkylphenyl group, a naphthyl group, a fluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, 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 dibenzosilolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, or an imidazopyrimidinyl group, each substituted with at least one deuterium, —F, —Cl, —Br, —I, —CD3, —CD2H, —CDH2, —CF3, —CF2H, —CFH2, 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 cyclooctyl group, a bicyclo[2.2.1]heptanyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a phenyl group, a biphenyl group, a C1-C20 alkylphenyl group, a naphthyl group, a fluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, 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 dibenzosilolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, —Si(Q11)(Q12)(Q13), —B(Q11)(Q12), —N(Q11)(Q12), or any combination thereof; or
—Si(Q1)(Q2)(Q3), —Ge(Q1)(Q2)(Q3), —B(Q1)(Q2), or —N(Q1)(Q2),
Q1 to Q3 and Q11 to Q13 are each independently:
a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an n-pentyl group, an isopentyl group, a 2-methylbutyl group, a sec-pentyl group, a tert-pentyl group, a neo-pentyl group, 3-pentyl group, a 3-methyl-2-butyl group, a phenyl group, a biphenyl group, a C1-C20 alkylphenyl group, or a naphthyl group; or
a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an n-pentyl group, an isopentyl group, a 2-methylbutyl group, a sec-pentyl group, a tert-pentyl group, a neo-pentyl group, a 3-pentyl group, a 3-methyl-2-butyl group, a phenyl group, or a naphthyl group, each substituted with at least one deuterium, a phenyl group, or any combination thereof,
b51 and b54 are each independently 1 or 2,
b53 and b55 are each independently 1, 2, or 3,
b52 is 1, 2, 3, or 4, and
* and *′ each indicate a binding site to a neighboring atom.

### Claim 12 (depends on 1)

The organometallic compound of claim 1, wherein
the organometallic compound is represented by Formula 11-1 or 11-2:
wherein, in Formulae 11-1 and 11-2,
M1, n1, A1 to A4, L1, L2, R1, R2, R10, R20, R30, R40, b10, b20, b30, and b40 are each the same as described in claim 1,
k1 and k2 are each independently 1 or 2,
X1 is C or N, X2 is C or N, and X3 is or N,
A5 and A6 are each independently a C5-C30 carbocyclic group or a C1-C30 heterocyclic group,
R50 and R60 are each independently hydrogen, deuterium, —F, —Cl, —Br, —I, —SF5, 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-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-C10 cycloalkyl group, a substituted or unsubstituted heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, —Si(Q1)(Q2)(Q3), —Ge(Q1)(Q2)(Q3), —N(Q4)(Q5), or —B(Q1)(Q2),
Q4 and Q5 are each the same as described for Q1, and
b50 and b60 are each independently an integer from 1 to 10.

### Claim 13 (depends on 1, 12)

The organometallic compound of claim 12, wherein
the organometallic compound is represented by one of Formulae 12-1 to 12-10:
wherein, in Formulae 12-1 to 12-10,
M1, n1, L1, and L2 are each the same as described in claim 1,
X20 is O, S, N(R28), or C(R28)(R29),
R11 to R19 are each independently the same as described in connection with R10,
R21 to R29 are each independently the same as described in connection with R20,
R31 to R34 are each independently the same as described in connection with R30,
R41 to R44 are each independently the same as described in connection with R40,
R51 to R54 are each independently the same as described in connection with R50, and
R61 to R64 are each independently the same as described in connection with R60.

### Claim 14 (depends on 1)

The organometallic compound of claim 1, wherein
the organometallic compound is electrically neutral.

### Claim 15 (depends on 1)

The organometallic compound of claim 1, wherein
the organometallic compound is one of Compounds 1 to 41:

### Claim 16 (depends on 1)

An organic light-emitting device comprising:
a first electrode;
a second electrode; and
an organic layer disposed between the first electrode and the second electrode and comprising an emission layer,
wherein the organic layer comprises at least one organometallic compound of claim 1.

### Claim 17 (depends on 16)

The organic light-emitting device of claim 16, wherein
the organometallic compound is included in the emission layer.

### Claim 18 (depends on 17)

The organic light-emitting device of claim 17, wherein
the emission layer further comprises a host, and an amount of the host is greater than an amount of the organometallic compound.

### Claim 19 (depends on 17)

The organic light-emitting device of claim 17, wherein
the emission layer emits green light having a maximum luminescence wavelength of about 400 nm to about 500 nm.

### Claim 20 (depends on 16)

The organic light-emitting device of claim 16, wherein
the first electrode is an anode,
the second electrode is a cathode,
the organic layer further comprises a hole transport region disposed between the first electrode and the emission layer and an electron transport region disposed between the emission layer and the second electrode,
the hole transport region comprises a hole injection layer, a hole transport layer, an electron blocking layer, a buffer layer, or any combination thereof, and
the electron transport region comprises a hole blocking layer, an electron transport layer, an electron injection layer, or any combination thereof.