Organometallic compound and organic light-emitting device including the same

1 . An organometallic compound represented by Formula 1:

wherein, in Formulae 1 and 1-1,

M 1 is Platinum (Pt),

L 1 is a ligand represented by Formula 1-1,

L 2 is selected from a monodentate ligand and a bidentate ligand,

n1 is 1,

n2 is 0,

ring A 11 and ring A 12 are each a benzene group,

X 11 is O,

Y 11 and Y 12 are each C,

Z 11 and Z 12 are each N,

Z 13 is selected from As and C(R 13 ),

Z 14 is selected from As and C(R 14 ),

Z 15 is C(R 15 ),

Z 16 and Z 17 are each C,

T 11 to T 14 are each independently a single bond,

L 11 is *—C(R 16 )(R 17 )—*′,

L 12 to L 14 are each a single bond,

a11 is 2, 3, or 4,

a12 to a14 are each independently selected from 0, 1, 2, and 3, wherein at least two selected from a12 to a14 are each independently selected from 1, 2, and 3,

when a12 is 0, ring A 11 and Z 11 are not linked, when a13 is 0, ring A 11 and ring A 12 are not linked, and when a14 is 0, ring A 12 and Z 16 are not linked,

R 11 to R 14 , and R 16 to R 19 are each independently selected from hydrogen, deuterium, methyl, ethyl, propyl, iso-butyl, sec-butyl, tert-butyl, pentyl, iso-amyl, hexyl, and a substituted or unsubstituted phenyl,

R 15 is a mesityl group or a 2,4,6-tris(propan-2-yl)phenyl group,

b11 and b12 are each independently selected from 1, 2, 3, 4, 5, 6, 7, and 8,

*1 to *4 each indicate a binding site to M 1 , and

* and *′ each indicate a binding site to a neighboring atom.

2 . The organometallic compound of claim 1 , wherein T 11 to T 14 are each a single bond.

3 . The organometallic compound of claim 1 , wherein L 1 is a ligand represented by Formula 1-11:

wherein, in Formula 1-11,

*1 to *4, A 11 , A 12 , X 11 , Y 11 , Y 12 , Z 11 to Z 16 , L 11 , L 12 , L 14 , a11, a12, a14, R 11 , R 12 , b11, and b12 are each independently the same as defined in connection with Formula 1-1.

4 . The organometallic compound of claim 1 , wherein L 2 is a ligand represented by one selected from Formulae 7-1 to 7-11:

wherein, in Formulae 7-1 to 7-11,

ring A 71 and ring A 72 are each independently selected from a C 5 -C 20 carbocyclic group and a C 1 -C 20 heterocyclic group,

X 71 and X 72 are each independently selected from C and N,

X 73 is N or C(Q 73 ), X 74 is N or C(Q 74 ), X 75 is N or C(Q 75 ), X 76 is N or C(Q 76 ), X 77 is N or C(Q 77 ), X 78 is O, S, or N(Q 78 ), and X 79 is O, S, or N(Q 79 ),

Y 71 and Y 72 are each independently selected from a single bond, a double bond, a substituted or unsubstituted C 1 -C 5 alkylene group, a substituted or unsubstituted C 2 -C 5 alkenylene group, and a substituted or unsubstituted C 6 -C 10 arylene group,

Z 71 and Z 72 are each independently selected from N, O, N(R 75 ), P(R 75 )(R 76 ), and As(R 75 )(R 76 ),

Z 73 is selected from P and As,

Z 74 is selected from CO and CH 2 ,

R 71 to R 80 and Q 73 to Q 79 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 substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl group, a substituted or unsubstituted C 1 -C 60 alkoxy 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 1 -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, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, wherein R 71 and R 72 are optionally linked to form a ring, R 77 and R 78 are optionally linked to form a ring, R 78 and R 79 are optionally linked to form a ring, and R 79 and R 80 are optionally linked to form a ring,

b71 and b72 are each independently selected from 1, 2, and 3, and

* and *′ each indicate a binding site to a neighboring atom.

5 . The organometallic compound of claim 1 , wherein the organometallic compound represented by Formula 1 is selected from Compounds 1, 2, 9, 14, 15, 17, and 18:

6 . The organometallic compound of claim 1 , wherein the organometallic compound represented by Formula 1 has an energy level of 10 kcal/mol or more at a 3 MC state.

7 . The organometallic compound of claim 1 , wherein the organometallic compound represented by Formula 1 has a bond dissociation energy of greater than 3.0 eV.

8 . The organometallic compound of claim 1 , wherein the organometallic compound represented by Formula 1 emits blue light having a maximum emission wavelength of 430 nm or more and less than 490 nm.

9 . An organic light-emitting device comprising:

a first electrode,

a second electrode; and

an organic layer between the first electrode and the second electrode and comprising an emission layer,

wherein the organic layer comprises an organometallic compound represented by Formula 1:

wherein, in Formulae 1 and 1-1,

M 1 is Platinum (Pt),

L 1 is a ligand represented by Formula 1-1,

L 2 is selected from a monodentate ligand and a bidentate ligand,

n1 is 1,

n2 is 0,

ring A 11 and ring A 12 are each a benzene group,

X 11 is O,

Y 11 and Y 12 are each C,

Z 11 and Z 12 are each N,

Z 13 is selected from As and C(R 13 ),

Z 14 is selected from As and C(R 14 ),

Z 15 is C(R 15 ),

Z 16 and Z 17 are each C,

T 11 to T 14 are each independently a single bond,

L 11 is *—C(R 16 )(R 17 )—*′,

L 12 to L 14 are each a single bond,

a11 is 2, 3, or 4,

a12 to a14 are each independently selected from 0, 1, 2, and 3, wherein at least two selected from a12 to a14 are each independently selected from 1, 2, and 3,

when a12 is 0, ring A 11 and Z 11 are not linked, when a13 is 0, ring A 11 and ring A 12 are not linked, and when a14 is 0, ring A 12 and Z 16 are not linked,

R 11 to R 14 , and R 16 to R 19 are each independently selected from hydrogen, deuterium, methyl, ethyl, propyl, iso-butyl, sec-butyl, tert-butyl, pentyl, iso-amyl, hexyl, and a substituted or unsubstituted phenyl,

R 15 is a mesityl group or a 2,4,6-tris(propan-2-yl)phenyl group,

b11 and b12 are each independently selected from 1, 2, and 3,

*1 to *4 each indicate a binding site to M 1 , and

* and *′ each indicate a binding site to a neighboring atom.

10 . The organic light-emitting device of claim 9 , 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/or 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 emission auxiliary layer, an electron blocking 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.

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