发明申请
- 专利标题: LIGHT-EMITTING ELEMENT
- 专利标题(中): 发光元件
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申请号: US14285754申请日: 2014-05-23
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公开(公告)号: US20140252338A1公开(公告)日: 2014-09-11
- 发明人: Satoshi SEO , Satoko SHITAGAKI , Nobuharu OHSAWA , Hideko INOUE , Hiroshi KADOMA , Harue OSAKA , Shunpei YAMAZAKI
- 申请人: Semiconductor Energy Laboratory Co., Ltd.
- 申请人地址: JP Atsugi-shi
- 专利权人: Semiconductor Energy Laboratory Co., Ltd.
- 当前专利权人: Semiconductor Energy Laboratory Co., Ltd.
- 当前专利权人地址: JP Atsugi-shi
- 优先权: JP2011-085423 20110407
- 主分类号: H01L51/50
- IPC分类号: H01L51/50
摘要:
To provide a light-emitting element with high emission efficiency or long lifetime, in which the use amount of a phosphorescent compound is small. To provide a light-emitting element including a light-emitting layer between a pair of electrodes, wherein the light-emitting layer includes a phosphorescent compound, a first organic compound, and a second organic compound, and the combination of the first organic compound and the second organic compound forms an exciplex. The light-emitting element transfers energy by utilizing the overlap between the emission spectrum of the exciplex and the absorption spectrum of the phosphorescent compound and thus has high energy transfer efficiency, even when the concentration of the phosphorescent compound is low.
公开/授权文献
- US09123907B2 Light-emitting element 公开/授权日:2015-09-01
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