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    • 6. 发明授权
    • Organic light emitting device with increased service life
    • 有机发光装置,寿命更长
    • US07084564B2
    • 2006-08-01
    • US10707299
    • 2003-12-04
    • Wen-Kuen ChenChao-Chin SungChung-Wen KoYi-Fan Wang
    • Wen-Kuen ChenChao-Chin SungChung-Wen KoYi-Fan Wang
    • H01J1/62H01J1/63H01J1/68H01J63/04B32B9/00
    • H01L51/5048H01L51/5012
    • An OLED including an anode layer, a first mixing layer over the anode layer, a mixing layer on the first mixing layer, a second mixing layer on the mixing layer, and a cathode layer over the second mixing layer is provided. The mixing layer is a mixture of an organic light emitting material, a hole and an electron transport material, and a volume ratio of the hole transport material to the electron transport material thereof is X %. The first and second mixing layers are both mixtures of the hole and electron transport materials. A volume ratio of the hole transport material to electron transport material in the first mixing layer decreases gradually from 99% to X % starting from the surface adhered to the anode layer, and that of the second mixing layer increases gradually from X % to 99% starting from the surface adhered to the mixing layer.
    • 提供了包括阳极层,阳极层上的第一混合层,第一混合层上的混合层,混合层上的第二混合层和第二混合层上的阴极层的OLED。 混合层是有机发光材料,空穴和电子传输材料的混合物,空穴传输材料与电子传输材料的体积比为X%。 第一和第二混合层都是空穴和电子传输材料的混合物。 第一混合层中的空穴传输材料与电子传输材料的体积比从附着到阳极层的表面开始从99%逐渐降低到X%,第二混合层的体积比从X%逐渐增加到99% 从粘附到混合层的表面开始。