Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device

• US 20140284578A1
• Filed: 03/20/2014
• Published: 09/25/2014
• Est. Priority Date: 03/25/2013
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Takeda, Kyoko, Seo, Satoshi, Seo, Hiromi, Takahashi, Tatsuyoshi
• Granted Patent: US 9,496,503 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/615 Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
• CPC Class Codes: H10K 85/633 comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/636 comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/6574 comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes
• CPC Class Codes: H10K 85/6576 comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene

Abstract

An organic compound having a low HOMO level and a high hole-transport property is provided. The organic compound is represented by Formula (G1), where Ar¹ represents a substituted or unsubstituted fluorenyl group, Ar² represents a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, and A¹ represents any one of a substituted or unsubstituted dibenzofuranyl group and a substituted or unsubstituted dibenzothiophenyl group. The low HOMO level and the high hole-transport property of the organic compound allow the formation of an exciplex with another organic compound, which leads to a highly efficient light-emitting element in the presence of a phosphorescent compound due to the effective overlapping between the emission of the exciplex and the longest absorption band of the phosphorescent compound.

Claims

1. An organic compound represented by Formula (G1):

2. The organic compound according to claim 1,

wherein:

the organic compound is represented by Formula (G2);

3. The organic compound according to claim 1,

wherein:

the organic compound is represented by Formula (G3);

4. The organic compound according to claim 1,

wherein:

the organic compound is represented by Formula (G4);

5. The organic compound according to claim 1,

wherein Ar² is selected from substituents represented by Formulae (1-1) to (1-11):

6. The organic compound according to claim 2,

wherein Ar³ is selected from substituents represented by Formulae (1-1) to (1-11):

7. The organic compound according to claim 1,

wherein the organic compound is represented by any one of Formulae (100) and (103):

8. A light-emitting device comprising:

a first electrode and a second electrode; and

a layer between the first electrode and the second electrode, the layer including an organic compound,

wherein;

the organic compound is represented by Formula (G1);

9. The light-emitting device according to claim 8,

wherein:

the organic compound is represented by Formula (G2);

10. The light-emitting device according to claim 8,

wherein:

the organic compound is represented by Formula (G3);

11. The light-emitting device according to claim 8,

wherein:

the organic compound is represented by Formula (G4);

12. The light-emitting device according to claim 8,

wherein Ar² is selected from substituents represented by Formulae (1-1) to (1-11):

13. The light-emitting device according to claim 9,

wherein Ar³ is selected from any of substituents represented by Formulae (1-1) to (1-11):

14. The light-emitting device according to claim 8,

wherein the organic compound is represented by any one of Formulae (100) and (103):

15. The light-emitting device according to claim 8,

wherein the layer further comprises a phosphorescent compound.

16. The light-emitting device according to claim 8,

wherein the layer further comprises a second organic compound and a phosphorescent compound, and

wherein the second organic compound forms an exciplex with the organic compound.

17. The light-emitting device according to claim 16,

wherein emission of the exciplex overlaps with an absorption band of the phosphorescent compound, which is located on the longest wavelength side.

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

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