Light-emitting element, light-emitting device, electronic device, and lighting device

• US 10,069,076 B2
• Filed: 08/04/2016
• Issued: 09/04/2018
• Est. Priority Date: 08/03/2012
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Hamada, Takao, Seo, Hiromi, Abe, Kanta, Takeda, Kyoko, Seo, Satoshi
• Primary Examiner(s): Clark, Gregory D
• Application Number:
  US15/228,557
• Publication Number:
  US 20160343942A1
• Time in Patent Office: 761 Days
• Field of Search: None
• CPC Class Codes: C07D 209/86 with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system
• CPC Class Codes: C09K 11/025 non-luminescent particle coatings or suspension media
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1007 Non-condensed systems
• CPC Class Codes: C09K 2211/1044 containing two nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/185 of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 2101/90 Multiple hosts in the emissive layer
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/12 comprising dopants
• CPC Class Codes: H10K 50/15 Hole transporting layers
• CPC Class Codes: H10K 50/16 Electron transporting layers
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/615 Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
• CPC Class Codes: H10K 85/624 containing six or more rings
• CPC Class Codes: H10K 85/626 containing more than one polycyclic condensed aromatic rings, e.g. bis-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 85/654 comprising only nitrogen as heteroatom H10K85/652 takes precedence
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
• CPC Class Codes: H10K 85/6576 : comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene

Abstract

A light-emitting element having a long lifetime is provided. A light-emitting element exhibiting high emission efficiency in a high luminance region is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains a first organic compound, a second organic compound, and a phosphorescent compound. The first organic compound is represented by a general formula (G0). The molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000. The second organic compound is a compound having an electron-transport property. In the general formula (G0), Ar¹ and Ar² each independently represent a fluorenyl group, a spirofluorenyl group, or a biphenyl group, and Ar³ represents a substituent including a carbazole skeleton.

Claims

1. A light-emitting element comprising:

a hole transport layer comprising a first organic compound; and

a light-emitting layer over the hole transport layer, the light-emitting layer comprising a second organic compound, a third organic compound, and a phosphorescent compound,

wherein the first organic compound is represented by General Formula (G1),

2. The light-emitting element according to claim 1,

wherein the first organic compound is represented by General Formula (G3),

3. The light-emitting element according to claim 1,

wherein the Ar¹ and the Ar² each independently represent a substituted or unsubstituted spiro-9,9′

-bifluoren-2-yl group, or a biphenyl-4-yl group.

4. A light-emitting device comprising the light-emitting element according to claim 1 in a light-emitting portion.

5. An electronic device comprising the light-emitting device according to claim 4 in a display portion.

6. A lighting device comprising the light-emitting device according to claim 4 in a light-emitting portion.

7. A light-emitting element comprising:

a hole transport layer comprising a first organic compound; and

a light-emitting layer over the hole transport layer, the light-emitting layer comprising a second organic compound, a third organic compound, and a phosphorescent compound,

wherein the first organic compound is represented by General Formula (G1),

8. The light-emitting element according to claim 7, wherein the first organic compound is represented by General Formula (G3),

9. The light-emitting element according to claim 7,

wherein the Ar¹ and the Ar² each independently represent a substituted or unsubstituted spiro-9,9′

-bifluoren-2-yl group, or a biphenyl-4-yl group.

10. A light-emitting device comprising the light-emitting element according to claim 7 in a light-emitting portion.

11. An electronic device comprising the light-emitting device according to claim 10 in a display portion.

12. A lighting device comprising the light-emitting device according to claim 10 in a light-emitting portion.

13. A light-emitting element comprising:

a hole transport layer comprising a first organic compound; and

a light-emitting layer over the hole transport layer, the light-emitting layer comprising a second organic compound, a third organic compound, and a phosphorescent compound,

wherein the first organic compound is represented by General Formula (G1),

14. The light-emitting element according to claim 13, wherein the first organic compound is represented by General Formula (G3),

15. The light-emitting element according to claim 13,

wherein the Ar¹ and the Ar² each independently represent a substituted or unsubstituted spiro-9,9′

-bifluoren-2-yl group, or a biphenyl-4-yl group.

16. A light-emitting device comprising the light-emitting element according to claim 13 in a light-emitting portion.

17. An electronic device comprising the light-emitting device according to claim 16 in a display portion.

18. A lighting device comprising the light-emitting device according to claim 16 in a light-emitting portion.

19. A light-emitting element comprising:

a hole transport layer comprising a first organic compound; and

a light-emitting layer over the hole transport layer, the light-emitting layer comprising a second organic compound, a third organic compound, and a phosphorescent compound,

wherein the first organic compound is represented by Formula (128),

20. A light-emitting device comprising the light-emitting element according to claim 19 in a light-emitting portion.

21. An electronic device comprising the light-emitting device according to claim 20 in a display portion.

22. A lighting device comprising the light-emitting device according to claim 20 in a light-emitting portion.

23. A light-emitting element comprising:

a hole transport layer comprising a first organic compound; and

a light-emitting layer over the hole transport layer, the light-emitting layer comprising a second organic compound, a third organic compound, and a phosphorescent compound,

wherein the first organic compound is represented by Formula (128),

24. A light-emitting device comprising the light-emitting element according to claim 23 in a light-emitting portion.

25. An electronic device comprising the light-emitting device according to claim 24 in a display portion.

26. A lighting device comprising the light-emitting device according to claim 24 in a light-emitting portion.

27. A light-emitting element comprising:

a hole transport layer comprising a first organic compound; and

a light-emitting layer over the hole transport layer, the light-emitting layer comprising a second organic compound, a third organic compound, and a phosphorescent compound,

wherein the first organic compound is represented by Formula (128),

28. A light-emitting device comprising the light-emitting element according to claim 27 in a light-emitting portion.

29. An electronic device comprising the light-emitting device according to claim 28 in a display portion.

30. A lighting device comprising the light-emitting device according to claim 28 in a light-emitting portion.