Invention Grant
- Patent Title: Light-emitting element, light-emitting device, electronic device, and lighting device
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Application No.: US18420214Application Date: 2024-01-23
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Publication No.: US12219873B2Publication Date: 2025-02-04
- Inventor: Satoshi Seo , Tsunenori Suzuki , Naoaki Hashimoto
- 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: JP2015-099866 20150515,JP2016-049620 20160314
- Main IPC: H01L51/50
- IPC: H01L51/50 ; H10K50/11 ; H10K50/155 ; H10K50/16 ; H10K50/84 ; H10K85/60 ; H10K101/30 ; H10K101/40

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
- US20240164209A1 Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device Public/Granted day:2024-05-16
Information query
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