Invention Grant
- Patent Title: Light-emitting element, light-emitting device, display device, lighting device, and electronic device
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Application No.: US14277450Application Date: 2014-05-14
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Publication No.: US10439156B2Publication Date: 2019-10-08
- Inventor: Satoko Shitagaki , Takahiro Ishisone , Satoshi Seo , Takeyoshi Watabe
- Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Applicant Address: JP
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP
- Agency: Husch Blackwell LLP
- Priority: JP2013-104941 20130517
- Main IPC: H01L51/00
- IPC: H01L51/00 ; H01L51/50

Abstract:
Provided is a light-emitting element which has an anode, a light-emitting layer over the anode, an electron-transport layer over and in contact with the light-emitting layer, an electron-injection layer over and in contact with the electron-transport layer, and a cathode over and in contact with the electron-injection layer. The light-emitting layer has an electron-transport property, and the electron-transport layer includes an anthracene derivative. The light-emitting layer further includes a phosphorescent substance. This device structure allows the formation of a highly efficient blue-emissive light-emitting element even though the phosphorescent substance has higher triplet energy than the anthracene derivative which directly contacts with the light-emitting layer.
Public/Granted literature
- US20140339524A1 LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, DISPLAY DEVICE, LIGHTING DEVICE, AND ELECTRONIC DEVICE Public/Granted day:2014-11-20
Information query
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