发明授权
US08529308B2 Organic electroluminescence element with enhanced electron blocking characteristics and manufacturing method thereof 有权
具有增强的电子阻挡特性的有机电致发光元件及其制造方法

Organic electroluminescence element with enhanced electron blocking characteristics and manufacturing method thereof
摘要:
To improve the light emission characteristics of a device when a transition metal oxide is used for the hole injection layer, in particular, to enhance the electron blocking characteristics of a transition metal oxide. An organic electroluminescence element comprising an anode, a cathode and a plurality of functional layers formed between the anode and the cathode, the functional layer containing a layer with a light-emitting function composed of at least one kind of an organic semiconductor and, between the anode and the layer with a light-emitting function, a charge injection layer composed of at least one kind of a transition metal oxide, wherein the ratio of the metal to oxygen at the anode side of the transition metal oxide layer is smaller than the stoichiometric ratio and at the same time, the ratio of the metal to oxygen at the layer with a light-emitting function side is greater than that at the anode side.
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