Invention Grant
- Patent Title: Light-emitting element, light-emitting device, electronic device, and lighting device
- Patent Title (中): 发光元件，发光元件，电子元件及照明器具
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Application No.: US14276621Application Date: 2014-05-13
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Publication No.: US09444063B2Publication Date: 2016-09-13
- Inventor: Yusuke Nonaka , Satoshi Seo , Harue Osaka , Tsunenori Suzuki , 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: JP2013/104016 20130516; JP2013-220059 20131023
- Main IPC: H01L29/08
- IPC: H01L29/08 ; H01L35/24 ; H01L51/00 ; H01L27/15 ; H01L29/26 ; H01L31/12 ; H01L33/00 ; H01L51/50 ; H01L51/52
Abstract:
To increase emission efficiency of a fluorescent light-emitting element by efficiently utilizing a triplet exciton generated in a light-emitting layer. The light-emitting layer of the light-emitting element includes at least a host material and a guest material. The triplet exciton generated from the host material in the light-emitting layer is changed to a singlet exciton by triplet-triplet annihilation (TTA). The guest material (fluorescent dopant) is made to emit light by energy transfer from the singlet exciton. Thus, the emission efficiency of the light-emitting element is improved.
Public/Granted literature
- US20140339522A1 LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE Public/Granted day:2014-11-20
Information query
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