Light-emitting element, light-emitting device, electronic device, lighting device, and organic compound
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United States of America Patent
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Jan 10, 2023
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app pub date -
Sep 13, 2019
filing date -
Jul 25, 2014
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Abstract
To provide a light-emitting element with an improved reliability, a light-emitting element with a high current efficiency (or a high quantum efficiency), and a novel dibenzo[f,h]quinoxaline derivative that is favorably used in a light-emitting element which is one embodiment of the present invention. A light-emitting element includes an EL layer between an anode and a cathode. The EL layer includes a light-emitting layer; the light-emitting layer contains a first organic compound having an electron-transport property and a hole-transport property, a second organic compound having a hole-transport property, and a light-emitting substance; the combination of the first organic compound and the second organic compound forms an exciplex; the HOMO level of the first organic compound is lower than the HOMO level of the second organic compound; and a difference between the HOMO level of the first organic compound and the HOMO level of the second organic compound is less than or equal to 0.4 eV.
First Claim
Family
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Hamada, Takao | Kanagawa, JP | 41 | 618 |
Inoue, Hideko | Kanagawa, JP | 216 | 5545 |
Kitano, Yasushi | Kanagawa, JP | 25 | 259 |
Seo, Satoshi | Kanagawa, JP | 1452 | 27431 |
Suzuki, Hiroki | Kanagawa, JP | 102 | 802 |
Takahashi, Tatsuyoshi | Kanagawa, JP | 120 | 1305 |
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