Invention Grant
- Patent Title: Light-emitting element, light-emitting device, electronic device, and lighting device
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Application No.: US15278379Application Date: 2016-09-28
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Publication No.: US10249837B2Publication Date: 2019-04-02
- Inventor: Takeyoshi Watabe , Satoshi Seo
- 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: Robinson Intellectual Property Law Office
- Agent Eric J. Robinson
- Priority: JP2013-063634 20130326
- Main IPC: H01L29/08
- IPC: H01L29/08 ; H01L51/50 ; C09K11/02 ; C09K11/06 ; H01L51/00

Abstract:
Provided is a light-emitting element having a light-emitting layer which contains at least a host material and a plurality of guest materials, where the host material has a lower T1 level than that of at least one of the plurality of guest materials. The emission of the one of the plurality of guest materials exhibits a multicomponent decay curve, and the lifetime thereof is less than or equal to 15 μsec, preferably less than or equal to 10 μsec, more preferably less than or equal to 5 μsec, where the lifetime is defined as a time for the emission to decrease in intensity to 1/100 of its initial intensity.
Public/Granted literature
- US20170018727A1 LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE Public/Granted day:2017-01-19
Information query
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