Invention Grant
- Patent Title: Light-emitting element, display device, electronic device, and lighting device
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Application No.: US17161982Application Date: 2021-01-29
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Publication No.: US11462702B2Publication Date: 2022-10-04
- Inventor: Satomi Mitsumori , Takeyoshi Watabe , Satoshi Seo , Yuko Kubota
- 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: JP2016-101787 20160520
- Main IPC: H01L51/50
- IPC: H01L51/50 ; H01L27/32 ; H01L51/00 ; H01L51/52

Abstract:
A light-emitting element having low driving voltage and high emission efficiency is provided. In the light-emitting element, a combination of a guest material and a host material forms an exciplex. The guest material is capable of converting triplet excitation energy into light emission. Light emission from the light-emitting layer includes light emission from the guest material and light emission from the exciplex. The percentage of the light emission from the exciplex to the light emission from the light-emitting layer is greater than 0 percent and less than or equal to 60 percent. The energy after subtracting the energy of light emission from the exciplex from the energy of light emission from the guest material is greater than 0 eV and less than or equal to 0.23 eV.
Public/Granted literature
- US20210159440A1 Light-Emitting Element, Display Device, Electronic Device, and Lighting Device Public/Granted day:2021-05-27
Information query
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