发明申请
- 专利标题: LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, LIGHTING DEVICE, AND ELECTRONIC DEVICE
- 专利标题(中): 发光元件,发光装置,照明装置和电子装置
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申请号: US13174948申请日: 2011-07-01
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公开(公告)号: US20110260156A1公开(公告)日: 2011-10-27
- 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 Atsugi
- 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 Atsugi
- 优先权: JP2008-306425 20081201; JP2009-131518 20090529
- 主分类号: H01L51/54
- IPC分类号: H01L51/54
摘要:
An object is to provide a light-emitting element which exhibits light emission with high luminance and can be driven at low voltage. Another object is to provide a light-emitting device or an electronic device with reduced power consumption. Between an anode and a cathode, n (n is a natural number of two or more) EL layers are provided, where between a first EL layer and a second EL layer, a first layer containing any of an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth metal compound, and a rare earth metal compound, a second layer containing a material having a high electron-transporting property in contact with the first layer, and a region containing a material having a high hole-transporting property and an acceptor material in contact with the second layer are provided in this order from the anode side.
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