发明名称 |
Light-emitting element, light-emitting device, electronic device, and lighting device |
摘要 |
An object is to provide a light-emitting element capable of emitting light with a high luminance even at a low voltage, and having a long lifetime. The light-emitting element includes n EL layers between an anode and a cathode (n is a natural number of two or more), and also includes, between m-th EL layer from the anode and (m+1)-th EL layer (m is a natural number, 1@m@n-1), a first layer including a first donor material in contact with the m-th EL layer, a second layer including an electron-transport material and a second donor material in contact with the first layer, and a third layer including a hole-transport material and an acceptor material in contact with the second layer and the (m+1)-th EL layer.
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申请公布号 |
US8502202(B2) |
申请公布日期 |
2013.08.06 |
申请号 |
US20100785648 |
申请日期 |
2010.05.24 |
申请人 |
NOWATARI HIROMI;SEO SATOSHI;OHSAWA NOBUHARU;USHIKUBO TAKAHIRO;TSUTSUI TETSUO;SEMICONDUCTOR ENERGY LABORATORY CO., LTD. |
发明人 |
NOWATARI HIROMI;SEO SATOSHI;OHSAWA NOBUHARU;USHIKUBO TAKAHIRO;TSUTSUI TETSUO |
分类号 |
H01L29/08 |
主分类号 |
H01L29/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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