Invention Grant
- Patent Title: Light-emitting element, light-emitting device, electronic device, and lighting device
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Application No.: US15154121Application Date: 2016-05-13
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Publication No.: US10263194B2Publication Date: 2019-04-16
- Inventor: Satoshi Seo , Tsunenori Suzuki , Naoaki Hashimoto
- Applicant: Semiconductor Energy Laboratory Co., Ltd.
- Applicant Address: JP
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP
- Agency: Husch Blackwell LLP
- Priority: JP2015-099866 20150515; JP2016-049620 20160314
- Main IPC: H01L51/00
- IPC: H01L51/00 ; H01L51/50 ; H01L51/52

Abstract:
Provided is a novel light-emitting element, a light-emitting element with a long lifetime, or a light-emitting element with high emission efficiency. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer includes at least a light-emitting layer containing a fluorescent substance and a host material, a first electron-transport layer containing a first electron-transport material, and a second electron-transport layer containing a second electron-transport material, which are in contact with each other and in this order. The LUMO level of each of the host material and the second electron-transport material is higher than the LUMO level of the first electron-transport material.
Public/Granted literature
- US20160336519A1 Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device Public/Granted day:2016-11-17
Information query
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