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    • 5. 发明申请
    • HIGH LIGHT EXTRACTION EFFICIENCY LIGHT EMITTING DIODE (LED) THROUGH MULTIPLE EXTRACTORS
    • 高光提取效率发光二极管(LED)通过多个提取器
    • WO2008060594A3
    • 2008-08-14
    • PCT/US2007023990
    • 2007-11-15
    • UNIV CALIFORNIADAVID AURELIEN J FWEISBUCH CLAUDE C AMURAI AKIHIKODENBAARS STEVEN P
    • DAVID AURELIEN J FWEISBUCH CLAUDE C AMURAI AKIHIKODENBAARS STEVEN P
    • H01S5/00H01L33/10H01L33/20
    • H01L33/20H01L33/10H01L2933/0083
    • An (Al,In,Ga)N and ZnO direct wafer bonded light emitting diode (LED), combined with a second light extractor acting as an additional light extraction method. This second light extraction method aims at extracting the light which has not been extracted by the ZnO structure, and more specifically the light which is trapped in the (Al,In,Ga)N layer. This second method is suited for light extraction from thin films, using surface patterning or texturing, or a photonic crystal acting as a diffraction grating. The combination of both the ZnO structure and the second light extraction method enables most of the emitted light from the LED to be extracted. In a more general extension of the present invention, the ZnO structure can be replaced by another material in order to achieve additional light extraction. In another extension, the (Al,In,Ga)N layer can be replaced by structures comprising other materials compositions, in order to achieve additional light extraction.
    • 将(Al,In,Ga)N和ZnO直接晶圆键合发光二极管(LED)与作为附加光提取方法的第二光提取器结合。 该第二光提取方法旨在提取未被ZnO结构提取的光,并且更具体地提取被捕获在(Al,In,Ga)N层中的光。 第二种方法适用于从薄膜中提取光,使用表面图案化或纹理化,或光子晶体充当衍射光栅。 ZnO结构和第二种光提取方法的组合使得能够提取来自LED的大部分发射光。 在本发明的更普遍的延伸中,为了实现额外的光提取,ZnO结构可以被另一种材料替代。 在另一个扩展中,(Al,In,Ga)N层可以被包含其他材料组成的结构代替,以实现额外的光提取。