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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/72915

    Title: 探討微奈米結構圖形化藍寶石基板對覆晶 LED 晶片的萃取效率之影響
    Authors: 林憲璋;Lin, Hsien-Chang
    Contributors: 光機電工程研究所
    Keywords: 有限時域差分法;嚴格耦合波分析;蒙地卡羅光線追跡法;Finite time difference domain;Rigorous coupled-wave analysis;Monte carlo ray tracing method
    Date: 2017-01-25
    Issue Date: 2017-05-05 17:16:26 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 發光二極體(LED)晶片的界面菲涅爾效應會限制其光的萃取率,
    寸在高寬比0.8 時,能達到最佳的光萃取率。;The light-extraction efficiency of light-emitting diodes (LEDs) is strictly limited by the Fresnel reflection. The patterned sapphire substrate technique can reduce the Fresnel reflection and enhance the light extraction
    efficiency. In this thesis, the size range of patterned structure is considered from a few microns to hundreds of nanometers. To obtain fast and accurate simulation, three simulation algorithms: finite time difference domain,
    rigorous coupled-wave analysis and Monte carlo ray tracing method are considered and found the preferred range of applications. The results show that appropriate simulation algorithms and parameter settings of simulation tools have obvious influence on simulation time and simulation accuracy. We also analyze influence of sphere-shape nano-patterned and micronpatterned sapphire substrate on LED, and we found that the largest light extraction efficiency can be obtained when the aspect ratio is 0.8.
    Appears in Collections:[光機電工程研究所 ] 博碩士論文

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