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    • 3. 发明申请
    • ORGANIC EL ELEMENT, DISPLAY APPARATUS, AND LIGHT-EMITTING APPARATUS
    • 有机EL元素,显示设备和发光设备
    • US20120132934A1
    • 2012-05-31
    • US13360984
    • 2012-01-30
    • Satoru OHUCHIHirofumi FUJITAShinya FUJIMURA
    • Satoru OHUCHIHirofumi FUJITAShinya FUJIMURA
    • H01L27/32H01L51/52
    • H01L51/5088H01L2251/55
    • An organic EL element has an anode, a cathode, a hole injection layer and at least one functional layer disposed between the anode and the cathode. The at least one functional layer contains an organic material. Holes are injected into the functional layer from the hole injection layer, which contains a tungsten oxide. A Ultraviolet Photoelectron Spectroscopy (UPS) spectrum obtained from a UPS measurement has a protrusion near a Fermi surface and within a region corresponding to a binding energy range lower than a top of the valence band. The tungsten oxide contained in the hole injection layer satisfies a condition, determined from an X-ray Photoelectronic Spectroscopy measurement, that a ratio in a number density of atoms other than tungsten and oxygen atoms to the tungsten atoms does not exceed approximately 0.83.
    • 有机EL元件具有阳极,阴极,空穴注入层和设置在阳极和阴极之间的至少一个功能层。 所述至少一个功能层含有有机材料。 从包含氧化钨的空穴注入层将孔注入功能层。 从UPS测量获得的紫外光电子能谱(UPS)光谱在费米面附近具有突起,并且在与低于价带顶部的结合能范围相对应的区域内。 包含在空穴注入层中的氧化钨满足从X射线光电子能谱测定确定的钨原子和氧原子之间的原子数与钨原子之间的比率不超过约0.83的条件。