发明授权
- 专利标题： Light-emitting element including a layer having a concentration gradient, light-emitting device, display, and electronic device
- 专利标题（中）： 发光元件包括具有浓度梯度的层，发光器件，显示器和电子器件
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申请号： US13166398申请日： 2011-06-22
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公开(公告)号： US08993126B2公开(公告)日： 2015-03-31
- 发明人: Hiromi Nowatari , Satoshi Seo , Nobuharu Ohsawa
- 申请人： Hiromi Nowatari , Satoshi Seo , Nobuharu Ohsawa
- 申请人地址： JP
- 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
- 代理机构： Husch Blackwell LLP
- 优先权： JP2010-144697 20100625
- 主分类号： H01L51/54
- IPC分类号： H01L51/54 ; H01L51/52 ; H01L51/00 ; H01L51/50 ; H01L27/32
摘要：
In the light-emitting element in which a plurality of EL layers is separated from each other by a charge generation layer, provided are an electron relay layer in contact with an anode side of the charge generation region and an electron transport layer in contact with the electron relay layer. The electron transport layer contains an alkaline earth metal. A concentration gradient of the alkaline earth metal contained in the electron transport layer is such that the concentration of the alkaline earth metal becomes lower from an interface between the electron transport layer and the electron relay layer to the anode.
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