微透鏡陣列對於提昇GaN LED光萃取效率之研究｜國立中央大學博碩士論文系統

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研究生：	李俊虢 Chun-Guo Lee
論文名稱：	微透鏡陣列對於提昇GaN LED光萃取效率之研究 Enhancement of light extraction efficiency for GaN LEDsby micro lens array
指導教授：	孫慶成 Sun Ching-Cherng
口試委員:
學位類別：	碩士 Master
系所名稱：	理學院 - 光電科學與工程學系 Department of Optics and Photonics
畢業學年度：	98
語文別：	中文
論文頁數：	93
中文關鍵詞：	表面粗化、光萃取效率、微透鏡陣列、圖案式藍寶石基板
外文關鍵詞：	micro lens array, patterned sapphire substrate, surface texture., light extraction efficiency
相關次數：	點閱：13 下載：0
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本論文中，我們以蒙地卡羅光線追跡法為基礎，建立了LED光萃取效率之光學模型，利用此模型分析GaN LED在不同微透鏡陣列結構下，光萃取效率的變化，探討當透鏡深寬比與表面填充率改變時，其對於晶片之光萃取效率影響；最後，在眾多光萃取機制中，尋找出光萃取效率之最佳值以及最佳結構參數。

In this thesis, we study light extraction efficiency of LEDs based on the simulation with Monte Carlo ray tracing. We analyze the light extraction efficiency for GaN LEDs with implanting different micro lens arrays with different aspect ratios and fill factors. Finally, we present the optimum structure parameters for the enhancement light extraction efficiency of GaN-based LEDs.

摘要	                                              I
Abstract                                              II
致謝                                                 III
目錄                                                  IV
圖索引	                                            VII
表索引	                                           XIII
第一章	緒論                                          1
1-1	前言                                          1
1-2	研究背景                                      2
1-3	研究動機                                      4
1-4	論文大綱                                      5
第二章	LED之光學特性分析                             7
2-1	LED發光原理                                   7
2-2	LED發光效率                                  10
2-3	LED光萃取效率機制                            14
2-3-1	全反射損耗                                   14
2-3-2	Fresnel損耗	                           16
2-3-3	材料吸收效應	                           17
2-4	LED光萃取結構	                           18
2-4-1	電流阻障層與窗口層	                           18
2-4-2	底部反射層	                           20
2-4-3	晶圓接合與覆晶接合	                           21
2-4-4	晶片塑形                                     23
2-4-5	表面粗化                                     25
2-4-6	圖案式藍寶石基板                             27
2-4-7	封裝                                         28
第三章	LED光萃取模型之建立                          30
3-1	蒙地卡羅光線追跡法	                           30
3-2	LED光萃取模型與模擬參數	                  31
3-3	材料吸收與光子循環複合效應                   35
3-4	主動層吸收效應與分析                         37
第四章	微透鏡陣列結構之光萃取效率分析               40
4-1	圖案式基板之光萃取效率分析                   40
4-2	p-GaN表面粗化之光萃取效率分析                44
4-3	圖案化基板加上p-GaN表面粗化之光萃取效率分析  48
4-4	覆晶接合之光萃取效率分析                     51
4-5	晶片塑型之光萃取效率分析                     55
第五章	結論                                         63
參考文獻                                              66
中英文名詞對照表                                      70

                                

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