发明申请
- 专利标题: LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE
- 专利标题(中): 发光元件,发光装置,电子装置和照明装置
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申请号: US12785648申请日: 2010-05-24
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公开(公告)号: US20100301317A1公开(公告)日: 2010-12-02
- 发明人: Hiromi NOWATARI , Satoshi SEO , Nobuharu OHSAWA , Takahiro USHIKUBO , Tetsuo TSUTSUI
- 申请人: Hiromi NOWATARI , Satoshi SEO , Nobuharu OHSAWA , Takahiro USHIKUBO , Tetsuo TSUTSUI
- 申请人地址: JP 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 Kanagawa-ken
- 优先权: JP2009-131096 20090529
- 主分类号: H01L51/54
- IPC分类号: H01L51/54
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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