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    • 2. 发明申请
    • Light-emitting element, light-emitting device, and electronic device
    • 发光元件,发光元件及电子元件
    • US20080142794A1
    • 2008-06-19
    • US11998400
    • 2007-11-29
    • Satoko SHITAGAKISatoshi SEORyoji NOMURA
    • Satoko SHITAGAKISatoshi SEORyoji NOMURA
    • H01L51/54
    • H01L51/5096H01L51/0067H01L51/5048H01L51/5052H01L2051/0063
    • A light-emitting element disclosed in the present invention includes a light-emitting layer and a first layer between a first electrode and a second electrode, in which the first layer is provided between the light-emitting layer and the first electrode. The present invention is characterized by the device structure in which the first layer comprising a hole-transporting material is doped with a hole-blocking material or an organic compound having a large dipole moment. This structure allows the formation of a high performance light-emitting element with high luminous efficiency and long lifetime. The device structure of the present invention facilitates the control of the rate of the carrier transport, and thus, leads to the formation of a light-emitting element with a well-controlled carrier balance, which contributes to the excellent characteristics of the light-emitting element of the present invention.
    • 本发明公开的发光元件包括在第一电极和第二电极之间的发光层和第一层,其中第一层设置在发光层和第一电极之间。 本发明的特征在于包含空穴传输材料的第一层掺杂有空穴阻挡材料或具有大偶极矩的有机化合物的器件结构。 这种结构允许形成具有高发光效率和长寿命的高性能发光元件。 本发明的器件结构有助于控制载流子传输速率,从而导致形成具有良好控制载流子平衡的发光元件,这有助于发光的优异特性 元件。