Invention Grant
- Patent Title: Light-emitting device, electronic device and light device each comprising light-emitting layer with mixed organic compounds capable of forming an exciplex
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Application No.: US15204081Application Date: 2016-07-07
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Publication No.: US09698365B2Publication Date: 2017-07-04
- Inventor: Hiromi Seo , Satoko Shitagaki , Satoshi Seo , Takahiro Ushikubo , Toshiki Sasaki , Shogo Uesaka
- 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: JP2012-087050 20120406
- Main IPC: H01L51/50
- IPC: H01L51/50 ; C09K11/06 ; H01L51/52 ; C07F15/00 ; H01L27/32 ; H01L51/00

Abstract:
A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting layer is provided between a pair of electrodes. The light-emitting layer is a stack of a first light-emitting layer, which contains at least a first phosphorescent compound, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property and is provided on the anode side, and a second light-emitting layer, which contains at least a second phosphorescent compound and the first organic compound having an electron-transport property. A combination of the first organic compound and the second organic compound forms an exciplex.
Public/Granted literature
- US20160315275A1 LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE Public/Granted day:2016-10-27
Information query
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