Organometallic compound, organic light-emitting device including the same and diagnostic composition including the organometallic compound

1. An organometallic compound represented by Formula 1:

M(L A ) n1 (L) n2   Formula 1

wherein, in Formula 1,

M is a transition metal,

L A is a ligand represented by one of Formulae 2A-11, 2A-12, 2A-13, 2A-14, 2A-15, 2A-16, 2A-17, 2A-18, 2A-19, 2A-20, 2A-21, 2A-22, 2A-23, 2A-24, 2A-25, 2A-26, 2A-27, 2A-28, 2A-29, 2A-30, 2A-31, 2A-32, 2A-33, 2A-34, 2A-35, 2A-36, 2A-37, 2A-38, 2A-39, 2A-40, 2A-41, 2A-42, 2A-43, 2A-44, 2A-45, 2A-46, 2A-47, 2A-48, 2A-49, 2A-50, 2A-51, 2A-52, 2A-53, 2A-54, 2A-55, 2A-56, 2A-57, 2A-58, 2A-59, 2A-60, 2A-61, 2A-62, 2A-63, and 2A-64,

L B is a ligand represented by Formula 2B,

n1 is 1, 2, or 3,

n2 is 0, 1, 2, or 3,

wherein, in Formulae 2A-11, 2A-12, 2A-13, 2A-14, 2A-15, 2A-16, 2A-17, 2A-18, 2A-19, 2A-20, 2A-21, 2A-22, 2A-23, 2A-24, 2A-25, 2A-26, 2A-27, 2A-28, 2A-29, 2A-30, 2A-31, 2A-32, 2A-33, 2A-34, 2A-35, 2A-36, 2A-37, 2A-38, 2A-39, 2A-40, 2A-41, 2A-42, 2A-43, 2A-44, 2A-45, 2A-46, 2A-47, 2A-48, 2A-49, 2A-50, 2A-51, 2A-52, 2A-53, 2A-54, 2A-55, 2A-56, 2A-57, 2A-58, 2A-59, 2A-60, 2A-61, 2A-62, 2A-63, 2A-64, and 2B,

X 30 is N and X 40 is C,

ring A 30 is a pyridine group and ring A 40 is a benzene group,

R 11 , R 21 , R 22 , R 23 , R 24 , R 25 , R 30 , R 40 , R 101 , R 102 , R 103 , and R 104 are each independently hydrogen, deuterium, —F, a hydroxyl group, a substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 2 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, —N(Q 1 )(Q 2 ), —Si(Q 3 )(Q 4 )(Q 5 ), or —Ge(Q 6 )(Q 7 )(Q 8 ),

adjacent R 101 and R 102 , adjacent R 102 and R 103 , adjacent R 103 and R 104 , adjacent R 101 and R 11 , adjacent R 21 and R 22 , adjacent R 23 and R 24 , two adjacent R 30 (s), and two adjacent R 40 (s) are optionally bonded to each other to form a substituted or unsubstituted C 5 -C 30 carbocyclic group or a substituted or unsubstituted C 1 -C 30 heterocyclic group,

c30, and c40 are each independently an integer 1 to 8; when c30 is 2 or greater, two or more R 30 (s) are identical to or different from each other; when c40 is 2 or greater, two or more R 40 (s) are identical to or different from each other,

* and *′ are binding sites to M in Formula 1,

at least one substituent of the substituted C 1 -C 60 alkyl group, the substituted C 2 -C 60 alkenyl group, the substituted C 3 -C 10 cycloalkyl group, the substituted C 1 -C 10 heterocycloalkyl group, the substituted C 3 -C 10 cycloalkenyl group, the substituted C 2 -C 10 heterocycloalkenyl group, the substituted C 6 -C 60 aryl group, the substituted C 6 -C 60 aryloxy group, the substituted C 6 -C 60 arylthio group, and the substituted C 1 -C 60 heteroaryl group, is:

deuterium, —F, —CD 3 , —CD 2 H, —CDH 2 , —CF 3 , —CF 2 H, —CFH 2 , a hydroxyl group, a C 1 -C 60 alkyl group, or a C 2 -C 60 alkenyl group; or

a C 1 -C 60 alkyl group or a C 2 -C 60 alkenyl group, each being substituted with at least one of deuterium, —F, —CD 3 , —CD 2 H, —CDH 2 , —CF 3 , —CF 2 H, —CFH 2 , a hydroxyl group, a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 2 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, N(Q 11 )(Q 12 ), —Si(Q 13 )(Q 14 )(Q 15 ), —Ge(Q 13 )(Q 14 )(Q 15 ), or a combination thereof; or

a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 2 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, or a C 1 -C 60 heteroaryl group; or

a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 2 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, or a C 1 -C 60 heteroaryl group, each being substituted with at least one of deuterium, —F, —CD 3 , —CD 2 H, —CDH 2 , —CF 3 , —CF 2 H, —CFH 2 , a hydroxyl group, a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 2 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, —N(Q 21 )(Q 22 ), —Si(Q 23 )(Q 24 )(Q 25 ), —Ge(Q 23 )(Q 24 )(Q 25 ), or a combination thereof; or

—N(Q 31 )(Q 32 ), —Si(Q 33 )(Q 34 )(Q 35 ), or —Ge(Q 33 )(Q 34 )(Q 35 ), and

Q 1 , Q 2 , Q 3 , Q 4 , Q 5 , Q 6 , Q 7 , Q 8 , Q 11 , Q 12 , Q 13 , Q 14 , Q 15 , Q 21 , Q 22 , Q 23 , Q 24 , Q 25 , Q 31 , Q 32 , Q 33 , Q 34 , and Q 35 , are each independently

CH 3 , —CD 3 , —CD 2 H, —CDH 2 , —CH 2 CH 3 , —CH 2 CD 3 , —CH 2 CD 2 H, —CH 2 CDH 2 , —CHDCH 3 , —CHDCD 2 H, —CHDCDH 2 , —CHDCD 3 , —CD 2 CD 3 , —CD 2 CD 2 H, or —CD 2 CDH 2 ;

an n-propyl group, an iso-propyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an n-pentyl group, an isopentyl group, a sec-pentyl group, a tert-pentyl group, a phenyl group, or a naphthyl group; or

an n-propyl group, an iso-propyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an n-pentyl group, an isopentyl group, a sec-pentyl group, a tert-pentyl group, a phenyl group, or a naphthyl group, each being substituted with at least one deuterium, a C 1 -C 10 alkyl group, a phenyl group, or a combination thereof.

2. The organometallic compound of claim 1 , wherein M is Ir, n1 is 1, 2 or 3, n2 is 0, 1 or 2, and the sum of n1 and n2 is 3; or

M is Pt, n1 is 1 or 2, n2 is 0 or 1, and the sum of n1 and n2 is 2.

3. The organometallic compound of claim 1 , wherein M is Ir, n1 is 1, and n2 is 2.

4. The organometallic compound of claim 1 , wherein R 11 and R 25 are each independently:

hydrogen or deuterium;

a C 1 -C 20 alkyl group unsubstituted or substituted with at least one of deuterium, —F, a cyclopentyl group, a cyclohexyl group, or a combination thereof; or

a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a phenyl group, a biphenyl group, a naphthyl group, a fluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, 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, or an imidazopyrimidinyl group, each unsubstituted or substituted with at least one deuterium, a C 1 -C 20 alkyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a phenyl group, a 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 benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, or a combination thereof.

5. The organometallic compound of claim 1 , wherein at least one of R 30 (s) in number of c30 and R 40 (s) in number of c40 is:

a C 1 -C 20 alkyl group unsubstituted or substituted with at least one of deuterium, —F, a cyclopentyl group, a cyclohexyl group, or a combination thereof;

a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a phenyl group, a biphenyl group, a naphthyl group, a fluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, 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, or an imidazopyrimidinyl group, each unsubstituted or substituted with at least one deuterium, a C 1 -C 20 alkyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a phenyl group, a 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 benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, or a combination thereof; or

—Si(Q 3 )(Q 4 )(Q 5 ), or —Ge(Q 6 )(Q 7 )(Q 8 ), and

Q 3 , Q 4 , Q 5 , Q 6 , Q 7 , and Q 8 are defined the same as those in claim 1 .

6. The organometallic compound of claim 1 , wherein L B is a ligand represented by one of Formulae 2B-21, 2B-22, 2B-23, and 2B-24:

wherein, in Formulae 2B-21, 2B-22, 2B-23, and 2B-24,

A is Si or Ge,

R 31 , R 32 , R 33 , and R 34 are each independently defined the same as R 30 in Formula 2B,

R 301 , R 302 , and R 303 are each independently

—CH 3 , —CD 3 , —CD 2 H, —CDH 2 , —CH 2 CH 3 , —CH 2 CD 3 , —CH 2 CD 2 H, —CH 2 CDH 2 , —CHDCH 3 , —CHDCD 2 H, —CHDCDH 2 , —CHDCD 3 , —CD 2 CD 3 , —CD 2 CD 2 H, or —CD 2 CDH 2 ;

an n-propyl group, an iso-propyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an n-pentyl group, an isopentyl group, a sec-pentyl group, a tert-pentyl group, a phenyl group, or a naphthyl group; or

an n-propyl group, an iso-propyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an n-pentyl group, an isopentyl group, a sec-pentyl group, a tert-pentyl group, a phenyl group, or a naphthyl group, each substituted with at least one deuterium, a C 1 -C 10 alkyl group, a phenyl group, or a combination thereof,

X 40 , A 40 , R 40 , and c40 are defined the same as those in Formula 2B, and

* and *′ are binding sites to M.

7. 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, the organic layer comprising the at least one of the organometallic compound of claim 1 .

8. The organic light-emitting device of claim 7 , wherein

the first electrode is an anode,

the second electrode is a cathode,

the organic layer further comprises a hole transport region between the first electrode and the emission layer, and an electron transport region 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 a combination thereof, and

the electron transport region comprises a hole blocking layer, an electron transport layer, an electron injection layer, or a combination thereof.

9. The organic light-emitting device of claim 7 , wherein the emission layer comprises the organometallic compound.

10. The organic light-emitting device of claim 9 , wherein the emission layer further comprises a host, and an amount by weight of the host in the emission layer is greater than an amount by weight of the organometallic compound.

11. A diagnostic composition comprising at least one of the organometallic compound of claim 1 .