发明授权
- 专利标题: Light-emitting element
- 专利标题(中): 发光元件
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申请号: US13419892申请日: 2012-03-14
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公开(公告)号: US09175213B2公开(公告)日: 2015-11-03
- 发明人: Satoshi Seo , Satoko Shitagaki , Nobuharu Ohsawa , Hideko Inoue , Kunihiko Suzuki
- 申请人: Satoshi Seo , Satoko Shitagaki , Nobuharu Ohsawa , Hideko Inoue , Kunihiko Suzuki
- 申请人地址: JP Atsugi-shi, Kanagawa-ken
- 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, Kanagawa-ken
- 代理机构: Robinson Intellectual Property Law Office, P.C.
- 代理商 Eric J. Robinson
- 优先权: JP2011-064553 20110323
- 主分类号: H01J1/62
- IPC分类号: H01J1/62 ; C09K11/06 ; C07D409/10 ; H01L51/00 ; H05B33/14 ; H01L51/50
摘要:
A light-emitting element having high external quantum efficiency is provided. A light-emitting element having low drive voltage is provided. Provided is a light-emitting element which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes. A combination of the first organic compound and the second organic compound forms an exciplex (excited complex). An emission spectrum of the exciplex overlaps with an absorption band located on the longest wavelength side of an absorption spectrum of the phosphorescent compound. A peak wavelength of the emission spectrum of the exciplex is longer than or equal to a peak wavelength of the absorption band located on the longest wavelength side of the absorption spectrum of the phosphorescent compound.
公开/授权文献
- US20120242219A1 LIGHT-EMITTING ELEMENT 公开/授权日:2012-09-27
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