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： US13415055申请日： 2012-03-08
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公开(公告)号： US20120168738A1公开(公告)日： 2012-07-05
- 发明人: Hiromi NOWATARI , Satoshi SEO , Nobuharu OHSAWA , Tetsuo TSUTSUI
- 申请人： Hiromi NOWATARI , Satoshi SEO , Nobuharu OHSAWA , Tetsuo TSUTSUI
- 申请人地址： JP Atsugi-shi
- 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-shi
- 优先权： JP2008-306153 20081201; JP2009-130539 20090529
- 主分类号： H01L51/54
- IPC分类号： H01L51/54
摘要：
Light-emitting elements in which an increase of driving voltage can be suppressed are provided. Light-emitting devices whose power consumption is reduced by including such light-emitting elements are also provided. In a light-emitting element having an EL layer between an anode and a cathode, a first layer in which carriers can be produced is formed between the cathode and the EL layer and in contact with the cathode, a second layer which transfers electrons produced in the first layer is formed in contact with the first layer, and a third layer which injects the electrons received from the second layer into the EL layer is formed in contact with the second layer.