Organometallic complex, and light-emitting element, light-emitting device and electronic device including the organometallic complex
View Patent ↗An organometallic complex with high emission efficiency and an organic light-emitting element having the organometallic complex are described. The organometallic complex has a structure represented by the following general formula (G1′).
1. An organometallic complex having a structure represented by a general formula (G1),
wherein Ar represents an aryl group having 6 to 25 carbon atoms;
R 1 represents any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, and an alkoxy group having 1 to 4 carbon atoms;
R 2 to R 8 each represent any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and a halogen element;
M represents a metal selected from Group 9 elements and Group 10 elements;
L represents a monoanionic ligand; and
n is 2 when the metal is a Group 9 element, and n is 1 when the metal is a Group 10 element.
2. The organometallic complex according to claim 1 , 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.
3. The organometallic complex according to claim 1 , wherein the monoanionic ligand is any one of monoanionic ligands represented by the following structural formulae (L1) to (L9):
4. The organometallic complex according to claim 1 , wherein the metal is iridium or platinum.
5. A light-emitting element comprising the organometallic complex according to claim 1 .
6. A lighting device comprising the light-emitting element according to claim 5 .
7. A light-emitting device comprising a light-emitting element including the organometallic complex according to claim 1 .
8. An electronic device comprising a display portion, wherein the display portion includes the light-emitting device according to claim 7 .
9. An organometallic complex having a structure represented by a general formula (G2),
wherein Ar represents an aryl group having 6 to 25 carbon atoms;
R 3 and R 6 each represent any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and a halogen element;
M represents a metal selected from Group 9 elements and Group 10 elements;
L represents a monoanionic ligand; and
n is 2 when the metal is a Group 9 element, and n is 1 when the metal is a Group 10 element.
10. The organometallic complex according to claim 9 , 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.
11. The organometallic complex according to claim 9 , wherein the monoanionic ligand is any one of monoanionic ligands represented by the following structural formulae (L1) to (L9):
12. The organometallic complex according to claim 9 , wherein the metal is iridium or platinum.
13. A light-emitting element comprising the organometallic complex according to claim 9 .
14. A lighting device comprising the light-emitting element according to claim 13 .
15. A light-emitting device comprising a light-emitting element including the organometallic complex according to claim 9 .
16. An electronic device comprising a display portion, wherein the display portion includes the light-emitting device according to claim 15 .
17. The organometallic complex according to claim 9 ,
wherein R 3 and R 6 each are hydrogen.
18. An organometallic complex having a structure represented by a general formula (G4),
wherein R 9 to R 13 each represent any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an aryl group having 6 to 12 carbon atoms, and a halogen element;
M represents a metal selected from Group 9 elements and Group 10 elements;
L represents a monoanionic ligand; and
n is 2 when the metal is a Group 9 element, and n is 1 when the metal is a Group 10 element.
19. The organometallic complex according to claim 18 , 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.
20. The organometallic complex according to claim 18 , wherein the monoanionic ligand is any one of monoanionic ligands represented by the following structural formulae (L1) to (L9):
21. The organometallic complex according to claim 18 , wherein the metal is iridium or platinum.
22. A light-emitting element comprising the organometallic complex according to claim 18 .
23. A lighting device comprising the light-emitting element according to claim 22 .
24. A light-emitting device comprising a light-emitting element including the organometallic complex according to claim 18 .
25. An electronic device comprising a display portion, wherein the display portion includes the light-emitting device according to claim 24 .
26. The organometallic complex according to claim 1 , wherein the monoanionic ligand is bidentate and has a β-diketone structure, a carboxyl group, or a phenolic hydroxyl group.
27. The organometallic complex according to claim 9 , wherein the monoanionic ligand is bidentate and has a β-diketone structure, a carboxyl group, or a phenolic hydroxyl group.
28. The organometallic complex according to claim 18 , wherein the monoanionic ligand is bidentate and has a β-diketone structure, a carboxyl group, or a phenolic hydroxyl group.
29. The organometallic complex according to claim 1 , wherein the monoanionic ligand is any one of monoanionic ligands represented by the following structural formulae:
30. The organometallic complex according to claim 9 , wherein the monoanionic ligand is any one of monoanionic ligands represented by the following structural formulae:
31. The organometallic complex according to claim 18 , wherein the monoanionic ligand is any one of monoanionic ligands represented by the following structural formulae: