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： PCT/JP2012053200申请日： 2012-02-06
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公开(公告)号： WO2012111579A9公开(公告)日： 2013-02-07
- 发明人: SHITAGAKI SATOKO , SEO SATOSHI , OHSAWA NOBUHARU , INOUE HIDEKO , SUZUKI KUNIHIKO
- 申请人： SEMICONDUCTOR ENERGY LAB , SHITAGAKI SATOKO , SEO SATOSHI , OHSAWA NOBUHARU , INOUE HIDEKO , SUZUKI KUNIHIKO
- 专利权人： SEMICONDUCTOR ENERGY LAB,SHITAGAKI SATOKO,SEO SATOSHI,OHSAWA NOBUHARU,INOUE HIDEKO,SUZUKI KUNIHIKO
- 当前专利权人： SEMICONDUCTOR ENERGY LAB,SHITAGAKI SATOKO,SEO SATOSHI,OHSAWA NOBUHARU,INOUE HIDEKO,SUZUKI KUNIHIKO
- 优先权： JP2011031462 2011-02-16
- 主分类号： H01L51/50
- IPC分类号： H01L51/50 ; C07D209/86 ; C07D239/26 ; C07D241/12 ; C07D333/76 ; C07D409/10 ; C07D471/04 ; C07F15/00 ; C09K11/06
摘要：
A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element is provided which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes, in which a combination of the first organic compound and the second organic compound forms an exciplex (excited complex). The light-emitting element transfers energy by utilizing an overlap between the emission spectrum of the exciplex and the absorption spectrum of the phosphorescent compound and thus has high energy transfer efficiency. Therefore, a light-emitting element having high external quantum efficiency can be obtained.
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