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    • 9. 发明授权
    • Organic electroluminescence element
    • 有机电致发光元件
    • US08933622B2
    • 2015-01-13
    • US11915348
    • 2006-05-23
    • Shin KawamiTaishi TsujiHideki SatoMasayoshi Yabe
    • Shin KawamiTaishi TsujiHideki SatoMasayoshi Yabe
    • H01L51/54H01L51/50H01L51/00
    • H01L51/5016H01L51/005H01L51/0072H01L51/008H01L51/0081H01L51/0085H01L51/5004H01L51/5048H01L51/5088H01L2251/558
    • Disclosed is an organic electroluminescent device having a longer drive life. Specifically disclosed is an organic electroluminescent device (100) comprising an organic material layer (16), which is composed of a hole transporting layer (164), a light-emitting layer (166) and an electron transporting layer (167), between a pair of electrodes, namely a cathode (18) and an anode (12). The light-emitting layer (166) (having a film thickness (dM) of 5-3000 nm) contains a luminescent dye and a host material. The first oxidation potential (ED+) of the luminescent dye is lower than the first oxidation potential (EH+) of the host material, while the first reduction potential (ED−) of the luminescent dye is lower than the first reduction potential (EH−) of the host material. The film thickness (dE: 5-3000 nm) of the electron transporting layer (167) and the film thickness (dH: 5-3000 nm) of the hole transporting layer (164) satisfy the following relation: dH≦dE.
    • 公开了具有较长驱动寿命的有机电致发光器件。 具体公开了一种有机电致发光器件(100),包括由空穴传输层(164),发光层(166)和电子传输层(167)组成的有机材料层(16) 一对电极,即阴极(18)和阳极(12)。 发光层(166)(膜厚(dM)为5-3000nm)含有发光染料和主体材料。 发光染料的第一氧化电位(ED +)低于主体材料的第一氧化电位(EH +),而发光染料的第一还原电位(ED-)低于第一还原电位(EH-) 的主体材料。 电子输送层(167)的膜厚(dE:5-3000nm)和空穴传输层(164)的膜厚(dH:5-3000nm)满足以下关系:dH≦̸ dE。