藍寶石基板側邊效應對藍/白光光形的影響;Sidewall Effect on the Blue/White Light Pattern of Sapphire-based LEDs

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题名:	藍寶石基板側邊效應對藍/白光光形的影響;Sidewall Effect on the Blue/White Light Pattern of Sapphire-based LEDs
作者:	薛震;Xue, Zhen
贡献者:	光電科學與工程學系
关键词:	藍寶石基板型發光二極體晶粒;光形分佈;白光發光二極體;光學模型;Sapphire-based LED Chip;Light Pattern;White LED;Optical Model
日期:	2017-07-26
上传时间:	2017-10-27 17:18:27 (UTC+8)
出版者:	國立中央大學
摘要:	本論文探討並分析藍寶石基板型發光二極體晶粒的側邊發光效應對於其藍/白光光形的影響，利用ASAP光學模擬軟體建立藍寶石基板型之發光二極體晶粒的光源模型，在該光源模型得到的模擬之藍光光形與實驗中裸晶或加半球透鏡下的量測藍光光形基本匹配的基礎上，結合孫慶成教授所領導之固態照明實驗室所提出之螢光粉模型建立流程，以YAG螢光粉為材料，首先在模擬中建立該YAG螢光粉之螢光粉模型，接著以模擬得到之加半球透鏡下的藍光光形作為晶片與螢光粉接觸面之出光光形，分別追跡藍/黃光在半球型封裝體下的光形分佈，從而得到白光光形之模擬結果，並與實驗之白光光形相比較，通過分析實驗與模擬的差異性，最終選擇在保持各個出光面光形不變的前提下，額外改變各個出光面所占的能量比重的方式，調整晶片表面的出光光形並獲得與實驗結果基本一致的模擬結果。藉由該光源模型的開發以及其在螢光粉封裝之白光發光二極管中的表現，可用於藍寶石基板型發光二極體晶粒在白光LED封裝中的封裝效率與色彩表現的優化。;In this thesis, we analyzed the sidewall effect of the sapphire-based LED on the light pattern both blue light and white light. By using the ASAP software, we built up the light source model of sapphire-based LED in the case of the highly matched on the light pattern both bare LED and LED with lens. On the basis of the phosphor optical models developed in the solid-state lighting laboratory whose supervisor is Dr. Ching-Cherng Sun, yellow phosphor has been well established. We regarded the light pattern recorded from light source model of LED with lens as the emitting surface to trace the blue light and the yellow light of the LED with phosphor and the LED with phosphor and silicone lens. Comparing the white light pattern of experiment and simulation, we tried to adjust the light pattern of the emitting surface by introducing the weighting coefficient to change the power percentage of each emitting surface based on the same light pattern of each surface. In this case, we finally obtained a similar white light pattern of the simulation as the experiment. Due to the model of white LEDs established, we could develop the package efficiency and the optical performance based on sapphire-based LED.
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