Invention Grant
- Patent Title: Light-emitting device, light-emitting apparatus, electronic device, and lighting device
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Application No.: US16981793Application Date: 2019-03-13
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Publication No.: US11647642B2Publication Date: 2023-05-09
- Inventor: Satoshi Seo , Tsunenori Suzuki , Yusuke Takita , Takumu Okuyama , Anna Tada
- Applicant: Semiconductor Energy Laboratory Co., Ltd.
- Applicant Address: JP Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Kanagawa-ken
- Agency: Husch Blackwell LLP
- Priority: JP 2018053135 2018.03.20
- International Application: PCT/IB2019/052020 2019.03.13
- International Announcement: WO2019/180545A 2019.09.26
- Date entered country: 2020-09-17
- Main IPC: H01L51/50
- IPC: H01L51/50

Abstract:
A novel light-emitting device is provided. Alternatively, a light-emitting device with favorable emission efficiency is provided. Alternatively, a light-emitting device with a favorable lifetime is provided. Alternatively, a light-emitting device with a low driving voltage is provided. Provided is a light-emitting device including an anode, a cathode, and a layer including an organic compound that is positioned between the anode and the cathode, in which the layer including the organic compound includes a first layer, a second layer, and a light-emitting layer in this order from the anode side, the first layer includes a first substance and a second substance, the second layer includes a third substance, the first substance is an organic compound a HOMO level of which is higher than or equal to −5.8 eV and lower than or equal to −5.4 eV, the second substance is a substance that has an electron-acceptor property with respect to the first substance, and the third substance is an organic compound having a structure in which at least two substituents comprising carbazole rings are bonded to a naphthalene ring.
Public/Granted literature
- US20210126213A1 Light-Emitting Device, Light-Emitting Apparatus, Electronic Device, and Lighting Device Public/Granted day:2021-04-29
Information query
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