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    • 7. 发明申请
    • Light-Emitting Element, Light-Emitting Device, and Electronic Device
    • 发光元件,发光元件和电子元件
    • US20090079326A1
    • 2009-03-26
    • US12212290
    • 2008-09-17
    • Satoshi SeoTsunenori SuzukiKaoru Ikeda
    • Satoshi SeoTsunenori SuzukiKaoru Ikeda
    • H01L33/00
    • H01L51/5048H01L51/5012H01L51/5016H01L51/5064H01L51/508H01L51/5088H01L2251/552
    • It is an object of the present invention to provide a light-emitting element with high light emission efficiency. It is another object of the present invention to provide a light-emitting element with a long lifetime. A light-emitting device is provided, which includes a light-emitting layer, a first layer, and a second layer between first electrode and a second electrode, wherein the first layer is provided between the light-emitting layer and the first electrode, the second layer is provided between the light-emitting layer and the second electrode, the first layer is a layer for controlling the hole transport, the second layer is a layer for controlling the electron transport, and a light emission from the light-emitting layer is obtained when voltage is applied to the first electrode and the second electrode so that potential of the first electrode is higher than potential of the second electrode.
    • 本发明的目的是提供一种发光效率高的发光元件。 本发明的另一个目的是提供一种寿命长的发光元件。 提供一种发光器件,其包括在第一电极和第二电极之间的发光层,第一层和第二层,其中第一层设置在发光层和第一电极之间, 第二层设置在发光层和第二电极之间,第一层是用于控制空穴传输的层,第二层是用于控制电子传输的层,来自发光层的发光是 当对第一电极和第二电极施加电压使得第一电极的电位高于第二电极的电位时获得。