IP Library › Granted Patent US 12,295,256
Granted Patent B2
US 12,295,256 · App. 18/376,537 · Granted May 6, 2025

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

Inventors: Takao Hamada (Kanagawa, JP); Hiromi Seo (Kanagawa, JP); Kanta Abe (Kanagawa, JP); Kyoko Takeda (Kanagawa, JP); Satoshi Seo (Kanagawa, JP)
Assignee: Semiconductor Energy Laboratory Co., Ltd.
H10K85/633C07D209/86C09K11/025C09K11/06H10K50/11H10K50/12H10K85/342H10K85/636H10K85/654H10K85/6572H10K85/6576C09K2211/1007C09K2211/1044C09K2211/185H10K50/15H10K50/16H10K85/615H10K85/624H10K85/626H10K2101/10H10K2101/90
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Quick Facts
Patent No.
US 12,295,256
App. No.
18/376,537
Granted
May 6, 2025
Kind
B2
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), Ar 1 and Ar 2 each independently represent a fluorenyl group, a spirofluorenyl group, or a biphenyl group, and Ar 3 represents a substituent including a carbazole skeleton.

Claims (37)

1. A light-emitting element comprising:

an anode,

a cathode,

a light-emitting layer comprising a first organic compound, a second organic compound, and an iridium complex between the anode and the cathode,

a first layer on the anode,

wherein the first layer comprises a third organic compound represented by General Formula (G0),

wherein Ar 1 and Ar 2 each independently represent a substituted or unsubstituted biphenyl group,

wherein a substituent of the substituted biphenyl group represents any one of an alkyl group having 1 to 10 carbon atoms, an unsubstituted phenyl group or a phenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms, an unsubstituted biphenyl group or a biphenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms, and an unsubstituted terphenyl group or a terphenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms,

wherein Ar 3 represents a substituent including a 9-aryl-9H-carbazol-3-yl skeleton, and

wherein the aryl group of the 9-aryl-9H-carbazol-3-yl skeleton represents an unsubstituted phenyl group or a phenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms, an unsubstituted biphenyl group or a biphenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms, an unsubstituted terphenyl group or a terphenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms.

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

wherein a molecular weight of the third organic compound is greater than or equal to 500 and less than or equal to 2000.

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

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

wherein an emission peak of the exciplex overlaps with an absorption band on a longest wavelength in an absorption spectrum of the iridium complex.

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

wherein the second organic compound comprises a quinoxaline skeleton, a dibenzoquinoxaline skeleton, a quinoline skeleton, a pyrimidine skeleton, a pyrazine skeleton, a pyridine skeleton, a diazole skeleton, or a triazole skeleton.

5. A light-emitting element comprising:

an anode,

a cathode,

a light-emitting layer comprising a first organic compound, a second organic compound, and an iridium complex between the anode and the cathode,

a first layer on the anode,

wherein the first layer comprises a halogen compound and a third organic compound represented by General Formula (G0),

wherein Ar 1 and Ar 2 each independently represent a substituted or unsubstituted biphenyl group,

wherein a substituent of the substituted biphenyl group represents any one of an alkyl group having 1 to 10 carbon atoms, an unsubstituted phenyl group or a phenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms, an unsubstituted biphenyl group or a biphenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms, and an unsubstituted terphenyl group or a terphenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms,

wherein Ar 3 represents a substituent including a 9-aryl-9H-carbazol-3-yl skeleton,

wherein the aryl group of the 9-aryl-9H-carbazol-3-yl skeleton represents an unsubstituted phenyl group or a phenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms, an unsubstituted biphenyl group or a biphenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms, an unsubstituted terphenyl group or a terphenyl group having as a substituent at least one alkyl group having 1 to 10 carbon atoms, and

wherein the halogen compound includes one of fluorine and chlorine.

6. The light-emitting element according to claim 5 ,

wherein a molecular weight of the third organic compound is greater than or equal to 500 and less than or equal to 2000.

7. The light-emitting element according to claim 5 ,

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

wherein an emission peak of the exciplex overlaps with an absorption band on a longest wavelength in an absorption spectrum of the iridium complex.

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

wherein the second organic compound comprises a quinoxaline skeleton, a dibenzoquinoxaline skeleton, a quinoline skeleton, a pyrimidine skeleton, a pyrazine skeleton, a pyridine skeleton, a diazole skeleton, or a triazole skeleton.

9. The light-emitting element according to claim 5 ,

wherein the halogen compound is one of F 4 -TCNQ and chloranil.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 4, 2023
From: HAMADA, TAKAO; SEO, HIROMI; ABE, KANTA; TAKEDA, KYOKO; SEO, SATOSHI
To: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Reel/Frame 065119/0802 →
Continuity (5)
Continuation 17345430 · Jun 11, 2021
Continuation 15999406 · Aug 20, 2018
Continuation 15228557 · Aug 4, 2016
Continuation 13957082 · Aug 1, 2013
Related Publication 20240057474A1 · Feb 15, 2024
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