ORGANOMETALLIC COMPOUND AND ORGANIC LIGHT-EMITTING DIODE INCLUDING THE SAME

1 . An organometallic compound represented by Chemical Formula 1:

Ir(L A ) m (L B ) n   <Chemical Formula 1>

in Chemical Formula 1,

Ir represents iridium,

m is an integer from 1 to 3, n is an integer from 0 to 2, and a sum of m and n is 3,

L A and L B are represented by Chemical Formula 2 and Chemical Formula 3, respectively:

in Chemical Formula 2,

p is 3,

R 1-1 , R 1-2 , R 1-3 , R 1-4 , R 2 , R 3-1 , R 3-2 , R 3-3 , R 4-1 , R 4-2 , R 5-1 , R 5-2 , R 5-3 , and R 5-4 each independently represents one selected from the group consisting of hydrogen, deuterium, halogen, C1 to C20 linear alkyl, C3 to C20 branched alkyl, C3 to C20 cycloalkyl, C3 to C20 heteroalkyl, C7 to C30 arylalkyl, C1 to C10 alkoxy, C6 to C20 aryloxy, amino, silyl, C2 to C20 alkenyl, C3 to C20 cycloalkenyl, C2 to C20 heteroalkenyl, C2 to C20 alkynyl, C6 to C30 aryl, C2 to C30 heteroaryl, and acyl, optionally, C1 to C20 linear alkyl, C3 to C20 branched alkyl, C3 to C20 cycloalkyl, C3 to C20 heteroalkyl, C7 to C30 arylalkyl, C1 to C10 alkoxy, C6 to C20 aryloxy, amino, silyl, C2 to C20 alkenyl, C3 to C20 cycloalkenyl, C2 to C20 heteroalkenyl, C2 to C20 alkynyl, C6 to C30 aryl, C2 to C30 heteroaryl are each independently substituted with at least one substituent selected from deuterium and halogen,

optionally, two adjacent groups among R 1-1 , R 1-2 , R 1-3 , and R 1-4 bind to each other to form a ring structure; optionally, two adjacent groups among a plurality of R 2 bind to each other to form a ring structure; optionally, two adjacent groups among R 3-1 , R 3-2 , and R 3-3 bind to each other to form a ring structure; optionally, R 4-1 and R 4 -2 bind to each other to form a ring structure;

and optionally, two adjacent groups among R 5-1 , R 5-2 , R 5-3 , and R 5-4 bind to each other to form a ring structure; and

Chemical Formula 3 represents a bidentate ligand.

2 . The organometallic compound of claim 1 , wherein L A includes a compound represented by one selected from the group consisting of Chemical Formula 2-1 and Chemical Formula 2-2:

in Chemical Formulas 2-1 and 2-2, R 2-1 , R 2-2 , and R 2-3 are the same as defined for R 2 , and

optionally, two adjacent groups among R 2-1 , R 2-2 , and R 2-3 bind to each other to form a ring structure.

3 . The organometallic compound of claim 1 , wherein L B includes a compound represented by one selected from the group consisting of Chemical Formula 3-1 and Chemical Formula 3-2:

in Chemical Formula 3-1 and Chemical Formula 3-2, R 6-1 , R 6-2 , R 6-3 , R 6-4 , R 7-1 , R 7-2 , R 7-3 , and R 7-4 each independently represents one selected from the group consisting of hydrogen, deuterium, C1 to C5 linear alkyl, C3 to C5 branched alkyl, and C6 to C10 aryl, and optionally, C1 to C5 linear alkyl and C3 to C5 branched alkyl are each independently substituted with at least one substituent selected from deuterium and halogen, and

optionally, two adjacent groups among R 6-1 , R 6-2 , R 6-3 , and R 6-4 bind to each other to form a ring structure; and optionally, two adjacent groups among R 7-1 , R 7-2 , R 7-3 , and R 7-4 bind to each other to form a ring structure; and

R 8 , R 9 , and R 10 each independently represents one selected from the group consisting of hydrogen, deuterium, C1 to C5 linear alkyl, and C3 to C5 branched alkyl, and optionally, C1 to C5 linear alkyl and C3 to C5 branched alkyl are each independently substituted with at least one substituent selected from deuterium and halogen, and

optionally, two adjacent groups among R 8 , R 9 , and R 10 bind to each other to form a ring structure.

4 . The organometallic compound of claim 1 , wherein R 1-1 , R 1-2 , R 1-3 , and R 1-4 each independently represents one selected from the group consisting of hydrogen, C1 to C5 linear alkyl, C3 to C10 branched alkyl, C6 to C10 aryl, and C7 to C10 arylalkyl, and

optionally, C1 to C5 linear alkyl, C3 to C10 branched alkyl, C6 to C10 aryl, and C7 to C10 arylalkyl are each independently substituted with deuterium.

5 . The organometallic compound of claim 1 , wherein each R 2 independently represents one selected from the group consisting of hydrogen, C1 to C5 linear alkyl, and C6 to C10 aryl.

6 . The organometallic compound of claim 1 , wherein R 3-1 , R 3-2 , R 3-3 , R 4-1 , R 4-2 , R 5-1 , R 5-2 , R 5-3 , and R 5-4 each independently represents one selected from the group consisting of hydrogen and C1 to C5 linear alkyl.

7 . The organometallic compound of claim 1 , wherein m is 1 and n is 2.

8 . The organometallic compound of claim 1 , wherein m is 2 and n is 1.

9 . The organometallic compound of claim 1 , wherein m is 3 and n is 0.

10 . The organometallic compound of claim 1 , wherein the organometallic compound represented by Chemical Formula 1 is one selected from the group consisting of compounds 1 to 220:

11 . The organometallic compound of claim 1 , wherein the organometallic compound represented by Chemical Formula 1 is a green phosphorescent material.

12 . An organic light-emitting diode comprising:

a first electrode;

a second electrode facing the first electrode; and

an organic layer disposed between the first electrode and the second electrode, the organic layer including a light-emitting layer that includes a dopant material including the organometallic compound according to claim 1 .

13 . The organic light-emitting diode of claim 12 , wherein the light-emitting layer is a green phosphorescent light-emitting layer.

14 . The organic light-emitting diode of claim 12 , wherein the organic layer further includes at least one selected from the group consisting of a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer.

15 . An organic light-emitting diode comprising:

a first electrode;

a second electrode facing the first electrode;

a first light-emitting stack; and

a second light-emitting stack,

wherein the first light-emitting stack and the second light-emitting stack are positioned between the first electrode and the second electrode,

wherein each of the first light-emitting stack and the second light-emitting stack includes at least one light-emitting layer, and

wherein at least one of the light-emitting layers includes a green phosphorescent light-emitting layer that includes a dopant material including the organometallic compound according to claim 1 .

16 . An organic light-emitting diode comprising:

a first electrode;

a second electrode facing the first electrode;

a first light-emitting stack;

a second light-emitting stack; and

a third light-emitting stack,

wherein the first light-emitting stack, the second light-emitting stack, and the third light-emitting stack are positioned between the first electrode and the second electrode,

wherein each of the first light-emitting stack, the second light-emitting stack and the third light-emitting stack includes at least one light-emitting layer, and

wherein at least one of the light-emitting layers includes a green phosphorescent light-emitting layer that includes a dopant material including the organometallic compound according to claim 1 .

17 . An organic light-emitting display device comprising:

a substrate;

a driving element positioned on the substrate; and

an organic light-emitting element disposed on the substrate and connected to the driving element, the organic light-emitting element including the organic light-emitting diode according to claim 12 .

18 . An organometallic compound represented by Chemical Formula 1:

Ir(L A ) m (L B ) n   <Chemical Formula 1>

in Chemical Formula 1,

Ir represents iridium,

m is an integer from 1 to 3, n is an integer from 0 to 2, and a sum of m and n is 3,

L A and L B are represented by Chemical Formula 2 and Chemical Formula 3-1, respectively:

in Chemical Formula 2,

p is 3,

R 1-1 , R 1-2 , R 1-3 , R 1-4 , R 2 , R 3-1 , R 3-2 , R 3-3 , R 4-1 , R 4-2 , R 5-1 , R 5-2 , R 5-3 , and R 5-4 each independently represents one selected from the group consisting of hydrogen, deuterium, halogen, C1 to C20 linear alkyl, C3 to C20 branched alkyl, C3 to C20 cycloalkyl, C3 to C20 heteroalkyl, C7 to C30 arylalkyl, C1 to C10 alkoxy, C6 to C20 aryloxy, amino, silyl, C2 to C20 alkenyl, C3 to C20 cycloalkenyl, C2 to C20 heteroalkenyl, C2 to C20 alkynyl, C6 to C30 aryl, C2 to C30 heteroaryl, and acyl, optionally, C1 to C20 linear alkyl, C3 to C20 branched alkyl, C3 to C20 cycloalkyl, C3 to C20 heteroalkyl, C7 to C30 arylalkyl, C1 to C10 alkoxy, C6 to C20 aryloxy, amino, silyl, C2 to C20 alkenyl, C3 to C20 cycloalkenyl, C2 to C20 heteroalkenyl, C2 to C20 alkynyl, C6 to C30 aryl, C2 to C30 heteroaryl are each independently substituted with at least one substituent selected from deuterium and halogen,

optionally, two adjacent groups among R 1-1 , R 1-2 , R 1-3 , and R 1-4 bind to each other to form a ring structure; optionally, two adjacent groups among a plurality of R 2 bind to each other to form a ring structure; optionally, two adjacent groups among R 3-1 , R 3-2 , and R 3-3 bind to each other to form a ring structure; optionally, R 4-1 and R 4 -2 bind to each other to form a ring structure; and optionally, two adjacent groups among R 5-1 , R 5-2 , R 5-3 , and R 5-4 bind to each other to form a ring structure; and

in Chemical Formula 3-1,

R 6-1 , R 6-2 , R 6-3 , R 6-4 , R 7-1 , R 7-2 , R 7-3 , and R 7-4 each independently represents one selected from the group consisting of hydrogen, deuterium, C1 to C5 linear alkyl, C3 to C5 branched alkyl, and C6 to C10 aryl, and optionally, C1 to C5 linear alkyl and C3 to C5 branched alkyl are each independently substituted with at least one substituent selected from deuterium and halogen, and

optionally, two adjacent groups among R 6-1 , R 6-2 , R 6-3 , and R 6-4 bind to each other to form a ring structure; and optionally, two adjacent groups among R 7-1 , R 7-2 , R 7-3 , and R 7-4 bind to each other to form a ring structure.

19 . The organometallic compound of claim 18 , wherein R 6-2 is a C1 to C5 linear alkyl that is optionally substituted with deuterium.

20 . The organometallic compound of claim 18 , wherein the organometallic compound is one selected from the group consisting of compounds 23, 31, 43, 51, 63, 71, 83, and 91: