Granted Patent B2

US 12,201,018 · App. 17/606,152 · Granted Jan 14, 2025

Inventors: Sachiko Kawakami (Kanagawa, JP); Nozomi Komatsu (Kanagawa, JP); Satoshi Seo (Kanagawa, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

H10K85/6572H10K85/622H10K85/626H10K85/654H10K50/11H10K50/15H10K50/16H10K50/841H10K2101/10

Abstract

Claims (57)

1. A light-emitting device comprising an anode, a cathode, and an EL layer,

wherein the EL layer is positioned between the anode and the cathode,

wherein the EL layer comprises a light-emitting layer and an electron-transport layer,

wherein the electron-transport layer is positioned between the light-emitting layer and the cathode,

wherein the light-emitting layer comprises a host material and an emission center substance,

wherein an absorption band positioned on the longest wavelength in an absorption spectrum of the emission center substance overlaps with a peak of an emission spectrum of the host material, and

wherein the electron-transport layer comprises an organic compound represented by General Formula (G1):

wherein Ar 1 represents a benzoquinolyl group or a benzoisoquinolyl group, and

wherein Ar 2 represents a triphenylenylnaphthylene group or a naphthylenyltriphenylene-diyl group.

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

wherein the Ar 1 is any of groups represented by Structural Formulae (1-1) to (1-11):

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

wherein the Ar 2 is any of groups represented by Structural Formulae (2-1) to (2-12):

4. The light-emitting device according to claim 1 ,

wherein the organic compound represented by the General Formula (G1) is an organic compound represented by Structural Formula (100):

5. The light-emitting device according to claim 1 ,

wherein the emission center substance is a phosphorescent substance.

6. The light-emitting device according to claim 1 ,

wherein the first organic compound is an organic compound having an electron-transport property, and

wherein the second organic compound is an organic compound having a hole-transport property.

7. An electronic device comprising the light-emitting device according to claim 1 , and a sensor, an operation button, a speaker, or a microphone.

8. A light-emitting apparatus comprising the light-emitting device according to claim 1 , and a transistor or a substrate.

9. A light-emitting apparatus comprising a plurality of light-emitting devices comprising a first light-emitting device and a second light-emitting device,

wherein the first light-emitting device comprises a fluorescent light-emitting layer and an electron-transport layer in contact with the fluorescent light-emitting layer,

wherein the second light-emitting device comprises a phosphorescent light-emitting layer and an electron-transport layer in contact with the phosphorescent light-emitting layer,

wherein the electron-transport layers of the first light-emitting device and the second light-emitting device are continuous, and

wherein the second light-emitting device is the light-emitting device a according to claim 1 .

10. The light-emitting apparatus according to claim 9 ,

wherein the fluorescent light-emitting layer comprises a fluorescent substance and an organic compound having an anthracene skeleton.

11. A lighting device comprising the light-emitting device according to claim 1 , and a housing.

12. A light-emitting device comprising an anode, a cathode, and an EL layer,

wherein the EL layer is positioned between the anode and the cathode,

wherein the EL layer comprises a light-emitting layer and an electron-transport layer,

wherein the electron-transport layer is positioned between the light-emitting layer and the cathode,

wherein the light-emitting layer comprises a first organic compound, a second organic compound, and an emission center substance,

wherein the first organic compound and the second organic compound form an exciplex, and

wherein the electron-transport layer comprises an organic compound represented by General Formula (G1):

wherein Ar 1 represents a benzoquinolyl group or a benzoisoquinolyl group, and

wherein Ar 2 represents a triphenylenylnaphthylene group or a naphthylenyltriphenylene-diyl group.

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

wherein an absorption band positioned on the longest wavelength in an absorption spectrum of the emission center substance overlaps with a peak of an emission spectrum of the exciplex.

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

wherein the Ar 1 is any of groups represented by Structural Formulae (1-1) to (1-11):

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

wherein the Ar 2 is any of groups represented by Structural Formulae (2-1) to (2-12):

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

wherein the emission center substance is a phosphorescent substance.

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

wherein the first organic compound is an organic compound having an electron-transport property, and

wherein the second organic compound is an organic compound having a hole-transport property.

18. An electronic device comprising the light-emitting device according to claim 12 , and a sensor, an operation button, a speaker, or a microphone.

19. A light-emitting apparatus comprising the light-emitting device according to claim 12 , and a transistor or a substrate.

20. A light-emitting apparatus comprising a plurality of light-emitting devices comprising a first light-emitting device and a second light-emitting device,

wherein the first light-emitting device comprises a fluorescent light-emitting layer and an electron-transport layer in contact with the fluorescent light-emitting layer,

wherein the second light-emitting device comprises a phosphorescent light-emitting layer and an electron-transport layer in contact with the phosphorescent light-emitting layer,

wherein the electron-transport layers of the first light-emitting device and the second light-emitting device are continuous, and

wherein the second light-emitting device comprises the light-emitting device according to claim 12 .

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (30)