发明授权
- 专利标题： Light-emitting element, light-emitting device, and electronic device
- 专利标题（中）： 发光元件，发光元件及电子元件
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申请号： US12638709申请日： 2009-12-15
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公开(公告)号： US08362466B2公开(公告)日： 2013-01-29
- 发明人: Takahiro Ushikubo , Satoshi Seo , Nobuharu Ohsawa
- 申请人： Takahiro Ushikubo , 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： JP2008-320918 20081217
- 主分类号： H01L29/08
- IPC分类号： H01L29/08
摘要：
A light-emitting element includes a light-emitting layer having a two-layer structure in which a first light-emitting layer containing a first light-emitting substance and a second light-emitting layer containing a second light-emitting substance, which is in contact with the first light-emitting layer, are provided between an anode and a cathode. The first light-emitting layer is separated into two layers of a layer provided on the anode side and a layer provided on the cathode side. The layer provided on the anode side contains only a first light-emitting substance, or a first organic compound of less than 50 wt % and the first light-emitting substance of 50 wt % to 100 wt %. The layer provided on the cathode side contains a second organic compound and the first light-emitting substance. The second light-emitting layer, which is provided in contact with the first light-emitting layer, contains the second light-emitting substance and a third organic compound.
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