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Browsing by Author "Lee, Yi-Jiun"

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    Enhancement of flip-chip light-emitting diodes with omni-directional reflector and textured micropillar arrays
    (2007-07-01)
    Lee, Chia-En
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    Lee, Yi-Jiun
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    Kuo, Hao-Chung
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    Tsai, Meng-Ru
    ;
    Cheng, B. S.
    The flip-chip light-emitting diodes (FC-LEDs) with a conductive omni-directional reflector and textured micropillar arrays were investigated. The micropillar arrays structure was formed on the bottom side of sapphire substrate by dry etching process to increase the light-extraction efficiency. The light output power of the FC-LED was increased by 65% for a 3.2-mu m textured micropillar on the bottom side of the sapphire substrate. Our work offers promising potential for enhancing output powers of commercial light-emitting devices.