发明名称 LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, LIGHTING DEVICE, AND ELECTRONIC DEVICE
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.
申请公布号 US2011260156(A1) 申请公布日期 2011.10.27
申请号 US201113174948 申请日期 2011.07.01
申请人 SEMICONDUCTOR ENERGY LABORATORY CO., LTD. 发明人 NOWATARI HIROMI;SEO SATOSHI;OHSAWA NOBUHARU;USHIKUBO TAKAHIRO;TSUTSUI TETSUO
分类号 H01L51/54 主分类号 H01L51/54
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