藍光LED微結構設計對光萃取效率之研究

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姓名

賈覲安(Jin-An Jia) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

藍光LED微結構設計對光萃取效率之研究
(Study of light extraction efficiency for blue-ray LEDs with micro structures)

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摘要(中)

在本論文中，我們使用TracePro光學模擬軟體其中的蒙地卡羅追跡法建立出LED之光學模型，探討在不同的基板下，切削角度對於GaN LED之光萃取效率的影響。結果顯示SiC封膠後，60度的切削角度光萃取效率可高達52.54%。另外，進一步利用表面結構之薄型氮化鎵Thin GaN，分析當表面微結構陣列之圓錐的角度改變時，其對於晶片之指向性和光萃取效率的提升幅度，結果指出封膠後圓錐微結構半角為65度時，光萃取效率可達81.16%。

摘要(英)

In this thesis, we build the optical model by TracePro based on Monte Carlo ray tracing method. Under different substrate in GaN LED, we analyze the light extraction efficiency (LEE) with different chip shaping angles. In the case of the SiC-based GaN LEDs, the slanted angle in 60°, with lens encapsulation, the LEE reaches 52.24%. Furthermore, we analyze the enhancement of the directionality and the LEE when the slanted angles of the cone array are different by changing surface texture of Thin GaN LED. In the case of Thin-GaN LEDs with diffuse reflector, the slanted angle of 65°with lens encapsulation, where the LEE reaches 81.16%.

關鍵字(中)

★ 氮化鎵
★ 光萃取效率

關鍵字(英)

★ GaN
★ light extraction efficiency

論文目次

IV
目錄
摘要 ................................................... I
Abstract ............................................. II
致謝 ................................................. III
目錄 .................................................. IV
圖目錄 ................................................ VI
第一章緒論.......................................... 1
1-1 前言 ............................................. 1
1-2 研究背景 .......................................... 2
1-3 研究動機 .......................................... 3
1-4 論文架構 .......................................... 4
第二章 LED 光學特性 .................................. 6
2-1 LED 發光原理 ...................................... 6
2-2 LED 發光效率之定義 ................................. 8
2-3 光萃取效率之原理 ................................... 11
2-4 光萃取方法 ........................................ 14
2-4-1 改進內部結構 .................................... 14
2-4-2 改變外型及表面結構 ............................... 16
第三章 LED 光萃取模型的建立 ............................20
3-1 引言 ............................................ 20
3-2 光學模型的參數設定 ................................. 21
第四章光萃取效率與指向性分析 .......................... 26
4-1 氮化鎵 LED 之光萃取效率分析 ....................... 26
4-1-1 裸晶切削基板對光萃取的影響 ......................... 26
4-1-2 封膠後切削基板對光萃取效率的影響 .................... 28
4-2 ThinGaN LED 表面微結構光萃取效率之分析 ............... 30
4-2-1 一般鍍銀反射面微結構對光萃取效率的影響 ............... 30
4-2-2 漫反射面微結構對光萃取效率的影響 .................... 38
第五章結論............................................ 45
5-1 總結 ............................................. 45
5-2 未來與展望 ........................................ 46
參考文獻 .............................................. 48

參考文獻

48
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指導教授

張榮森(Rong-Seng Chang)

審核日期

2012-8-20

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