Organometallic complex, light-emitting element, light-emitting device, electronic device, and lighting device
View Patent ↗An object is to provide a novel organometallic complex capable of emitting phosphorescence by using, as a ligand, an organic compound with which a variety of derivatives can be easily synthesized. Another object is to provide an organometallic complex having high heat resistance. Other objects are to provide a light-emitting element having high emission efficiency and to provide a light-emitting device, an electronic device, and a lighting device having reduced power consumption. Provided are an organometallic complex including a structure represented by the following General Formula (G1), and a light-emitting element, a light-emitting device, an electronic device, and a lighting device formed using the organometallic complex including the structure represented by the following General Formula (G1).
1. A complex including a structure represented by Formula (G1),
wherein:
R 1 represents any of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and an alkylthio group having 1 to 4 carbon atoms;
R 2 represents any of hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and an alkylthio group having 1 to 4 carbon atoms;
R 3 represents hydrogen or an alkyl group having 1 to 4 carbon atoms;
Ar 1 represents a condensed aromatic hydrocarbon group having 10 to 13 carbon atoms, and Ar 2 represents an aromatic hydrocarbon group having 6 to 13 carbon atoms; and
M represents a Group 9 element or a Group 10 element.
2. The complex according to claim 1 , wherein R 3 is hydrogen.
3. The complex according to claim 1 , wherein M is iridium or platinum.
4. A light-emitting element comprising the complex according to claim 1 .
5. The light-emitting element according to claim 4 , further comprising a light-emitting layer,
wherein the complex is included in the light-emitting layer.
6. A light-emitting device comprising the light-emitting element according to claim 4 .
7. An electronic device comprising the light-emitting device according to claim 6 .
8. A lighting device comprising the light-emitting device according to claim 6 .
9. The complex according to claim 1 , wherein Ar 1 has a substituent.
10. The complex according to claim 1 , wherein Ar 2 has a substituent.
11. A complex represented by Formula (G3),
wherein:
R 1 represents any of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and an alkylthio group having 1 to 4 carbon atoms;
R 2 represents any of hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and an alkylthio group having 1 to 4 carbon atoms;
R 3 represents hydrogen or an alkyl group having 1 to 4 carbon atoms;
one of Ar 1 and Ar 2 represents a condensed aromatic hydrocarbon group having 10 to 13 carbon atoms, and the other of Ar 1 and Ar 2 represents an aromatic hydrocarbon group having 6 to 13 carbon atoms;
M represents a Group 9 element or a Group 10 element;
L represents a monoanionic bidentate chelate ligand having a beta-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 each of two ligands is nitrogen; and
n is 2 when M is a Group 9 element or n is 1 when M is a Group 10 element.
12. The complex according to claim 11 , wherein R 3 is hydrogen.
13. The complex according to claim 11 , wherein M is iridium or platinum.
14. A light-emitting element comprising the complex according to claim 11 .
15. The light-emitting element according to claim 14 , further comprising a light-emitting layer,
wherein the complex is included in the light-emitting layer.
16. A light-emitting device comprising the light-emitting element according to claim 14 .
17. An electronic device comprising the light-emitting device according to claim 16 .
18. A lighting device comprising the light-emitting device according to claim 16 .
19. The complex according to claim 11 , wherein Ar 1 has a substituent.
20. The complex according to claim 11 , wherein Ar 2 has a substituent.
21. The complex according to claim 11 , wherein L is represented by any of Formulae (L1) to (L6),
wherein:
R 10 to R 29 separately represent any of hydrogen, an alkyl group having 1 to 4 carbon atoms, a halogen, a haloalkyl group, an alkoxy group having 1 to 4 carbon atoms, or an alkylthio group having 1 to 4 carbon atoms;
A 1 to A 3 separately represent nitrogen, carbon bonded to hydrogen, or carbon bonded to a substituent R; and
the substituent R represents any of an alkyl group having 1 to 4 carbon atoms, a haloalkyl group having 1 to 4 carbon atoms, and a phenyl group.
22. A complex represented by Formula (G5),
wherein:
R 1 represents any of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and an alkylthio group having 1 to 4 carbon atoms;
R 2 represents any of hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and an alkylthio group having 1 to 4 carbon atoms;
R 3 represents hydrogen or an alkyl group having 1 to 4 carbon atoms;
Ar 1 represents a condensed aromatic hydrocarbon group having 10 to 13 carbon atoms, and Ar 2 represents an aromatic hydrocarbon group having 6 to 13 carbon atoms;
M represents a Group 9 element or a Group 10 element; and
n is 2 when M is a Group 9 element or n is 1 when M is a Group 10 element.
23. The complex according to claim 22 , wherein R 3 is hydrogen.
24. The complex according to claim 22 , wherein M is iridium or platinum.
25. A light-emitting element comprising the complex according to claim 22 .
26. The light-emitting element according to claim 25 , further comprising a light-emitting layer,
wherein the complex is included in the light-emitting layer.
27. A light-emitting device comprising the light-emitting element according to claim 25 .
28. An electronic device comprising the light-emitting device according to claim 27 .
29. A lighting device comprising the light-emitting device according to claim 27 .
30. The complex according to claim 22 , wherein Ar 1 has a substituent.
31. The complex according to claim 22 , wherein Ar 2 has a substituent.
32. The complex according to claim 11 ,
wherein Ar 1 represents a benzene ring.
33. The complex according to claim 1 ,
wherein Ar 1 represents a naphthalene ring or a fluorene ring; and
wherein Ar 2 represents an aromatic hydrocarbon group having 6 to 13 carbon atoms.