Invention Grant
- Patent Title: Light-emitting device, light-emitting apparatus, electronic device, and lighting device
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Application No.: US17048642Application Date: 2019-10-03
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Publication No.: US12082429B2Publication Date: 2024-09-03
- Inventor: Satoshi Seo , Tsunenori Suzuki , Takumu Okuyama , Yusuke Takita , Naoaki Hashimoto , Hiromi Seo , Nobuharu Ohsawa , Toshiki Sasaki , Shunpei Yamazaki
- Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Applicant Address: JP Atsugi
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Atsugi
- Agency: Fish & Richardson P.C.
- Priority: JP 18191678 2018.10.10 JP 18191681 2018.10.10 JP 18191887 2018.10.10 JP 18225260 2018.11.30 JP 19020057 2019.02.06 JP 19087060 2019.04.30
- International Application: PCT/IB2019/058406 2019.10.03
- International Announcement: WO2020/075014A 2020.04.16
- Date entered country: 2020-10-19
- Main IPC: H10K50/11
- IPC: H10K50/11 ; H10K50/15 ; H10K50/16 ; H10K50/17 ; H10K85/60 ; H10K101/30 ; H10K101/40 ; H10K85/30 ; H10K101/10

Abstract:
A novel light-emitting device is provided. Alternatively, a light-emitting device with high emission efficiency is provided. Alternatively, a light-emitting device having a long lifetime is provided. Alternatively, a light-emitting device having low driving voltage is provided. A light-emitting device including an EL layer including a first layer, a second layer, a third layer, a light-emitting layer, and a fourth layer in this order from the anode side is provided. The first layer includes a first organic compound and a second organic compound. The fourth layer includes a seventh organic compound. The first organic compound exhibits an electron-accepting property with respect to the second organic compound. The HOMO level of the second organic compound is from −5.7 eV to −5.4 eV. The HOMO level of the seventh organic compound is −6.0 eV or higher.
Public/Granted literature
- US20210249619A1 LIGHT-EMITTING DEVICE, LIGHT-EMITTING APPARATUS, ELECTRONIC DEVICE, AND LIGHTING DEVICE Public/Granted day:2021-08-12
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