Organometallic complex, light-emitting element, light-emitting device, electronic device, and lighting device
Provided are a light-emitting element including a novel organometallic complex as an emission center, the organometallic complex, a light-emitting device, an electronic device, and a lighting device each using the light-emitting element. One embodiment of the present invention is a light-emitting element including, as an emission center, an organometallic complex in which a benzofuropyrimidine derivative is coordinated to a metal. In particular, another embodiment is a light-emitting element including, as an emission center, an organometallic complex in which a benzofuropyrimidine derivative having an aryl group at the 4-position is coordinated to a metal. Another embodiment is a light-emitting element including, as an emission center, an organometallic complex in which nitrogen at the 3-position of a benzofuropyrimidine derivative having an aryl group at the 4-position is coordinated to a metal and the aryl group is bonded to the metal.
1. A light-emitting element comprising an organometallic complex comprising a benzofuropyrimidine derivative,
wherein the benzofuropyrimidine derivative is coordinated to a metal, and
wherein the benzofuropyrimidine derivative has an aryl group at a 4-position.
2. The light-emitting element according to claim 1 ,
wherein nitrogen at a 3-position of the benzofuropyrimidine derivative is coordinated to the metal, and
wherein the aryl group is bonded to the metal.
3. The light-emitting element according to claim 1 , wherein the metal is a Group 9 element or a Group 10 element.
4. The light-emitting element according to claim 1 , wherein the metal is iridium.
5. A display device comprising the light-emitting element according to claim 1 .
6. An electronic device comprising the light-emitting element according to claim 1 .
7. A lighting device comprising the light-emitting element according to claim 1 .
8. An organometallic complex comprising a structure represented by a general formula (G1),
wherein R 1 represents hydrogen or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms,
wherein R 2 to R 5 separately represent any of hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted monocyclic saturated hydrocarbon having 5 to 7 carbon atoms, a substituted or unsubstituted polycyclic saturated hydrocarbon having 7 to 10 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms,
wherein Ar represents a substituted or unsubstituted arylene group having 6 to 10 carbon atoms, and
wherein M represents a Group 9 element or a Group 10 element.
9. The organometallic complex according to claim 8 ,
wherein the structure is represented by a general formula (G2), and
wherein n is 3 when the M is the Group 9 element, or n is 2 when the M is the Group 10 element.
10. The organometallic complex according to claim 8 , wherein the structure is represented by a general formula (G3),
wherein n is 2 when the M is the Group 9 element, or n is 1 when the M is the Group 10 element, and
wherein L represents a monoanionic ligand.
11. The organometallic complex according to claim 10 ,
wherein the monoanionic ligand is represented by any of general formulae (L1) to (L7),
wherein R 11 to R 51 separately represent any of hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a halogen group, a vinyl group, a substituted or unsubstituted haloalkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 6 carbon atoms, and a substituted or unsubstituted alkylthio group having 1 to 6 carbon atoms, and
wherein A 1 to A 3 separately represent any of nitrogen, sp 2 hybridized carbon bonded to hydrogen, and sp 2 hybridized carbon bonded to any of an alkyl group having 1 to 6 carbon atoms, a halogen group, a haloalkyl group having 1 to 6 carbon atoms, and a phenyl group.
12. The organometallic complex according to claim 8 , wherein the organometallic complex is represented by a structural formula (100),
13. The organometallic complex according to claim 8 , wherein the organometallic complex is represented by a structural formula (101),
14. A light-emitting element comprising the organometallic complex according to claim 8 .
15. A display device comprising the light-emitting element according to claim 14 .
16. An electronic device comprising the light-emitting element according to claim 14 .
17. A lighting device comprising the light-emitting element according to claim 14 .
18. An organometallic complex comprising a benzofuropyrimidine derivative,
wherein the benzofuropyrimidine derivative is coordinated to a metal, and
wherein the benzofuropyrimidine derivative has an aryl group at a 4-position.
19. The organometallic complex according to claim 18 ,
wherein nitrogen at a 3-position of the benzofuropyrimidine derivative is coordinated to the metal, and
wherein the aryl group is bonded to the metal.
20. The organometallic complex according to claim 18 , wherein the metal is a Group 9 element or a Group 10 element.
21. The organometallic complex according to claim 18 , wherein the metal is iridium.