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    • 90. 发明授权
    • Light emitting element
    • 发光元件
    • US07622200B2
    • 2009-11-24
    • US11132061
    • 2005-05-18
    • Nobuharu OhsawaHiroko Abe
    • Nobuharu OhsawaHiroko Abe
    • B32B9/00B32B19/00
    • H01L51/5048H01L27/3244H01L51/0085H01L51/5052H01L2251/5323Y02P20/582Y10S428/917Y10T428/24942
    • The present invention relates to a thin film light emitting element which has low drive voltage. In particular, the present invention relates to a thin film light emitting element which has low drive voltage and in which color purity and luminous efficiency are not deteriorated. A structure of a light emitting element of the present invention comprises at least an electron transporting layer, a light emitting layer containing a luminescent substance, a first region, and a second region are provided between electrodes, wherein the electron transporting layer includes the second region between the light emitting layer and the first region, the first region includes a substance containing a polycyclic condensed ring, and the second region does not include the substance containing a polycyclic condensed ring.
    • 本发明涉及一种具有低驱动电压的薄膜发光元件。 特别地,本发明涉及一种驱动电压低,色纯度和发光效率不劣化的薄膜发光元件。 本发明的发光元件的结构至少包括电子传输层,含有发光物质的发光层,第一区域和第二区域,其中电子传输层包括第二区域 在发光层和第一区域之间,第一区域包括含有多环稠环的物质,第二区域不包括含有多环稠环的物质。