Invention Grant
- Patent Title: Exciplex light-emitting device
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Application No.: US15911225Application Date: 2018-03-05
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Publication No.: US10686153B2Publication Date: 2020-06-16
- Inventor: Takahiro Ishisone , Satoshi Seo , Yusuke Nonaka , Nobuharu Ohsawa
- Applicant: Semiconductor Energy Laboratory Co., Ltd.
- Applicant Address: JP Atsugi-shi, Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Atsugi-shi, Kanagawa-ken
- Agency: Fish & Richardson P.C.
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@4b5eef7b com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@7037801c
- Main IPC: H01L51/50
- IPC: H01L51/50 ; H01L51/00

Abstract:
Provided is a light-emitting element which includes a first electrode, a second electrode over the first electrode, and first and second light-emitting layers therebetween. The first light-emitting layer contains a first host material and a first light-emitting material, and the second light-emitting layer contains a second host material and a second light-emitting material. The first light-emitting material is a fluorescent material, and the second light-emitting material is a phosphorescent material. The level of the lowest triplet excited state (T1 level) of the first light-emitting material is higher than the T1 level of the first host material. A light-emitting device, an electronic device, and a lighting device including the light-emitting element are further provided.
Public/Granted literature
- US20180261788A1 LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, DISPLAY DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE Public/Granted day:2018-09-13
Information query
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