Heterocyclic compound, light-emitting element, light-emitting device, electronic device, and lighting device

Patent metadata

Field	Value
Publication number	US-9133169-B2
Application number	US-201213596757-A
Country	US
Kind code	B2
Filing date	Aug 28, 2012
Priority date	Aug 31, 2011
Publication date	Sep 15, 2015
Grant date	Sep 15, 2015

Abstract

Provided is a novel heterocyclic compound which can be used in a light-emitting layer of a light-emitting element as a host material in which a light-emitting substance is dispersed. A heterocyclic compound represented by a general formula (G1) is provided. Any one of R 1 to R 10 represents a substituent represented by a general formula (G1-1), another one of R 1 to R 10 represents a substituent represented by a general formula (G1-2), and the others separately represent hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted biphenyl group. Further, α 1 and α 2 separately represent a substituted or unsubstituted phenylene group or a substituted or unsubstituted biphenyldiyl group, and A 1 and A 2 separately represent a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzothiophenyl group, or a substituted or unsubstituted dibenzofuranyl group.

First claim

What is claimed is:

1. An organic compound represented by a formula (G1):

wherein any one of R 1 to R 10 represents a substituent represented by a formula (G1-1), another one of R 1 to R 10 represents a substituent represented by a formula (G1-2), and the others separately represent hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted biphenyl group:

wherein α 1 and α 2 separately represent a substituted or unsubstituted phenylene group or a substituted or unsubstituted biphenyldiyl group, and
wherein A 1 and A 2 separately represent a substituted or unsubstituted dibenzothiophenyl group or a substituted or unsubstituted dibenzofuranyl group.

2. The organic compound according to claim 1 ,
wherein the organic compound is represented by a formula (G2-1):

and
wherein R 11 to R 18 separately represent hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted biphenyl group.

3. The organic compound according to claim 1 ,
wherein the organic compound is represented by a formula (G2-2):

and
wherein R 21 to R 28 separately represent hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted biphenyl group.

4. The organic compound according to claim 1 ,
wherein α 1 and the α 2 are separately represented by a formula (α-1) or a formula (α-2):

and
wherein R 31 to R 34 and R 41 to R 48 separately represent hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzothiophenyl group, or a substituted or unsubstituted dibenzofuranyl group.

5. The organic compound according to claim 1 ,
wherein A 1 and A 2 are separately represented by any one of formulae (1-1) and (1-2):

and
wherein R 51 to R 57 and R 61 to R 67 separately represent hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted biphenyl group.

6. The organic compound according to claim 1 ,
wherein A 1 and A 2 are each represented by a formula (1-1):

wherein R 51 to R 57 separately represent hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted biphenyl group.

7. The organic compound according to claim 1 ,
wherein A 1 the A 2 are each represented by a formula (1-2):

and
wherein R 61 to R 67 separately represent hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted biphenyl group.

8. A light-emitting device comprising:
a pair of electrodes; and
a light-emitting layer containing an organic compound between the pair of electrodes,
wherein the organic compound is represented by a formula (G1):

wherein any one of R 1 to R 10 represents a substituent represented by a formula (G1-1), another one of R 1 to R 10 represents a substituent represented by a formula (G1-2), and the others separately represent hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted biphenyl group:

wherein α 1 and α 2 separately represent a substituted or unsubstituted phenylene group or a substituted or unsubstituted biphenyldiyl group, and
wherein A 1 and A 2 separately represent a substituted or unsubstituted dibenzothiophenyl group or a substituted or unsubstituted dibenzofuranyl group.

9. The light-emitting device according to claim 8 , wherein the light-emitting layer further comprises a light-emitting substance.

10. The light-emitting device according to claim 9 , wherein the light-emitting substance is a phosphorescent compound.

11. The light-emitting device according to claim 8 , further comprising an electron-transport layer between the light-emitting layer and one of the pair of electrodes, wherein the electron-transport layer comprises the organic compound.

12. The light-emitting device according to claim 11 , wherein the electron-transport layer is in contact with the light-emitting layer.

13. The light-emitting device according to claim 11 , further comprising a second electron-transport layer between the electron-transport layer and the one of the pair of electrodes.

14. An electronic device comprising the light-emitting device according to claim 8 .

15. A lighting device comprising the light-emitting device according to claim 8 .

16. The light-emitting device according to claim 8 ,
wherein the organic compound is represented by a formula (G2-1):

and
wherein R 11 to R 18 separately represent hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted biphenyl group.

17. The light-emitting device according to claim 8 ,
wherein the organic compound is represented by a formula (G2-2):

and
wherein R 21 to R 28 separately represent hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted biphenyl group.

18. The light-emitting device according to claim 8 ,
wherein α 1 and the α 2 are separately represented by a formula (α-1) or a formula (α-2):

and
wherein R 31 to R 34 and R 41 to R 48 separately represent hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzothiophenyl group, or a substituted or unsubstituted dibenzofuranyl group.

19. The light-emitting device according to claim 8 ,
wherein A 1 and A 2 are separately represented by any one of formulae (1-1) and (1-2):

Assignees

• Kitano Yasushi
• Osaka Harue
• Shitagaki Satoko
• Semiconductor Energy Lab

Inventors

• Kitano Yasushi
• Osaka Harue
• Shitagaki Satoko

Classifications

• H10K50/166

  comprising a multilayered structure · CPC title

• H10K50/11

  characterised by the electroluminescent [EL] layers · CPC title

• H10K85/6574

  comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes · CPC title

• H10K85/6572

  comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole · CPC title

• H10K85/6576

  comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene · CPC title