Organometallic complex and light-emitting element, light-emitting device and electronic device using the same

1. An organometallic complex comprising a structure represented by a general formula (G10):

wherein R 1 represents an alkyl group having 1 to 4 carbon atoms; R 2 and R 3 each represent any one of hydrogen and an alkyl group having 1 to 4 carbon atoms; Ar represents any one of formulas (G7) to (G9); R 7 and R 8 each represent an alkyl group having 1 to 4 carbon atoms; M is a center metal selected from Group 9 element; α represents a position of carbon which bonds the center metal in the arylene group; L represents a monoanionic ligand; and n is 2;

wherein the monoanionic ligand is any one of a monoanionic bidentate chelate ligand having a β-diketone structure, a monoanionic bidentate chelate ligand having a carboxyl group, a monoanionic bidentate chelate ligand having a phenolic hydroxyl group, and a monoanionic bidentate chelate ligand in which two ligand elements are both nitrogen.

2. The organometallic complex according to claim 1 ,

wherein the monoanionic ligand is represented by any one of (L1) to (L8)

3. The organometallic complex according to claim 1 ,

wherein the center metal is iridium.

4. A lighting apparatus comprising a light-emitting element,

wherein the light-emitting element includes the organometallic complex according to claim 1 .

5. A light-emitting element including the organometallic complex according to claim 1 .

6. A light-emitting device including the light-emitting element according to claim 5 .

7. An electronic device including the light-emitting element according to claim 5 .

8. An organometallic complex comprising a structure represented by a general formula (G11):

wherein R 1 represents an alkyl group having 1 to 4 carbon atoms; R 2 represents any one of hydrogen and an alkyl group having 1 to 4 carbon atoms; Ar represents any one of formulas (G7) to (G9); R 7 and R 8 each represent an alkyl group having 1 to 4 carbon atoms; M is a center metal selected from Group 9 element; α represents a position of carbon which bonds the center metal in the arylene group; L represents a monoanionic ligand; and n is 2;

wherein the monoanionic ligand is any one of a monoanionic bidentate chelate ligand having a β-diketone structure, a monoanionic bidentate chelate ligand having a carboxyl group, a monoanionic bidentate chelate ligand having a phenolic hydroxyl group, and a monoanionic bidentate chelate ligand in which two ligand elements are both nitrogen.

9. The organometallic complex according to claim 8 ,

wherein the monoanionic ligand is represented by any one of (L1) to (L8)

10. The organometallic complex according to claim 8 ,

wherein the center metal is iridium.

11. A lighting apparatus comprising a light-emitting element,

wherein the light-emitting element includes the organometallic complex according to claim 8 .

12. A light-emitting element including the organometallic complex according to claim 8 .

13. A light-emitting device including the light-emitting element according to claim 12 .

14. An electronic device including the light-emitting element according to claim 12 .

15. An organometallic complex comprising a structure represented by a general formula (G12):

wherein R 1 represents an alkyl group having 1 to 4 carbon atoms; R 2 and R 3 each represent any one of hydrogen and an alkyl group having 1 to 4 carbon atoms; R 4 to R 6 each represent a hydrogen or an electron-donating group selected from the group consisting of an unsubstituted alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dialkylamino group having 2 to 8 carbon atoms, or a diarylamino group having 12 to 24 carbon atoms;

M is a center metal selected from Group 9 element; L represents a monoanionic ligand; and n is 2;

wherein the monoanionic ligand is any one of a monoanionic bidentate chelate ligand having a β-diketone structure, a monoanionic bidentate chelate ligand having a carboxyl group, a monoanionic bidentate chelate ligand having a phenolic hydroxyl group, and a monoanionic bidentate chelate ligand in which two ligand elements are both nitrogen.

16. The organometallic complex according to claim 15 ,

wherein the monoanionic ligand is represented by any one of (L1) to (L8)

17. The organometallic complex according to claim 15 ,

wherein the center metal is iridium.

18. A lighting apparatus comprising a light-emitting element,

wherein the light-emitting element includes the organometallic complex according to claim 15 .

19. A light-emitting element including the organometallic complex according to claim 15 .

20. A light-emitting device including the light-emitting element according to claim 19 .

21. An electronic device including the light-emitting element according to claim 19 .

22. An organometallic complex comprising a structure represented by a general formula (G13):

wherein R 1 represents an alkyl group having 1 to 4 carbon atoms; R 2 represents any one of hydrogen and an alkyl group having 1 to 4 carbon atoms; R 4 to R 6 each represent a hydrogen or an electron-donating group selected from the group consisting of an unsubstituted alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dialkylamino group having 2 to 8 carbon atoms, or a diarylamino group having 12 to 24 carbon atoms;

M is a center metal selected from Group 9 element; L represents a monoanionic ligand; and n is 2;

wherein the monoanionic ligand is any one of a monoanionic bidentate chelate ligand having a β-diketone structure, a monoanionic bidentate chelate ligand having a carboxyl group, a monoanionic bidentate chelate ligand having a phenolic hydroxyl group, and a monoanionic bidentate chelate ligand in which two ligand elements are both nitrogen.

23. The organometallic complex according to claim 22 ,

wherein the monoanionic ligand is represented by any one of (L1) to (L8)

24. The organometallic complex according to claim 22 , wherein the center metal is iridium.

25. A lighting apparatus comprising a light-emitting element,

wherein the light-emitting element includes the organometallic complex according to claim 22 .

26. A light-emitting element including the organometallic complex according to claim 22 .

27. A light-emitting device including the light-emitting element according to claim 26 .

28. An electronic device including the light-emitting element according to claim 26 .

29. An organometallic complex comprising a structure represented by a general formula (G14):

wherein R 1 represents an alkyl group having 1 to 4 carbon atoms; R 2 represents any one of hydrogen and an alkyl group having 1 to 4 carbon atoms; R 5 represents a hydrogen or an electron-donating group selected from the group consisting of an unsubstituted alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dialkylamino group having 2 to 8 carbon atoms, or a diarylamino group having 12 to 24 carbon atoms;

M is a center metal selected from Group 9 element; L represents a monoanionic ligand; and n is 2;

wherein the monoanionic ligand is any one of a monoanionic bidentate chelate ligand having a β-diketone structure, a monoanionic bidentate chelate ligand having a carboxyl group, a monoanionic bidentate chelate ligand having a phenolic hydroxyl group, and a monoanionic bidentate chelate ligand in which two ligand elements are both nitrogen.

30. The organometallic complex according to claim 29 , wherein the monoanionic ligand is represented by any one of (L1) to (L8)

31. The organometallic complex according to claim 29 ,

wherein the center metal is iridium.

32. A lighting apparatus comprising a light-emitting element,

wherein the light-emitting element includes the organometallic complex according to claim 29 .

33. A light-emitting element including the organometallic complex according to claim 29 .

34. A light-emitting device including the light-emitting element according to claim 33 .

35. An electronic device including the light-emitting element according to claim 33 .