氮化鋁鎵深紫外光發光二極體高光效之封裝研究

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姓名

林浚朋(Chun-Peng Lin) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

氮化鋁鎵深紫外光發光二極體高光效之封裝研究
(Research on High-efficiency Packaging of AlGaN-Based Deep-Ultraviolet Light-Emitting Diodes)

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至系統瀏覽論文 (2024-7-30以後開放)

摘要(中)

紫外線LED(Light Emitting Diodes)使用的情境與其他波長的LED非常不同，因此在設計時需考量其獨特的需求。與一般照明不同的是，工業上的用途通常重點在於輻照度。在相同晶片規格下，較高的光萃取效率及較高的輻照度通常是不可兼得的。其中封裝設計的光萃取效率(LEE：Light Extraction Efficiency)關係到輻射通量（Radiant flux），封裝的光學元件之發光角度關係到輻照度（Irradiance）。
目前UVC LED封裝大部分是採金屬凹杯陶瓷基板加上平面石英玻璃的組合。不過此設計之光萃取效率是較為差勁的，因此如何提高LED 封裝光萃取效率，便是一個需要討論的課題。
本論文中，先探討提高LED 封裝光萃取效率及輻照度的方法，接著將一般市面上所常見的UVC LED封裝做為基準進行分類，並相互比對其光電特性，包含了輻射通量、輻照度及發光角度。本文列出了7種類型的封裝設計並將其製作成樣品，綜合考慮了上述7類的特性，改良了其中一款反射杯的封裝，並以市面上最常見的凹杯基板加上平面石英玻璃為基準，進行各種光學的量測及分析比較。最後順利的提高了LED 封裝光萃取效率(+8.7%)且提高輻照度一倍(+103%)

摘要(英)

Applications for UV LEDs are very different from other wavelengths of LEDs, so some unique requirements for UV LEDs must be considered when some optical designs are needed. Unlike general lighting, industrial applications for UV LEDs usually focus on irradiance. However, it is nearly impossible to have high light extraction efficiency and high irradiance at the same time under the same chip size. Furthermore, the light extraction efficiency of the package design is related to the radiant flux, and the light-emitting angle of the packaged optical element is related to the irradiance.
Generally speaking, UVC LED packaging is a combination of metal concave cup ceramic substrate and flat quartz cover. However, the light extraction efficiency is poor under the general packaging. The most important topic rests in how to design and develop a UV LED packaging that can improve the light extraction efficiency.
In this thesis, methods of improving light extraction efficiency and irradiance of LED will be first discussed, and then the comparison will be made between common UVC LED packages on the market by several optical characteristics, such as radiant flux, irradiance and light angle. In our work, seven types of common packaging structures for UVC LEDs are listed and discussed. By optimizing one of the above packaging structures, various optical measurements and comparisons are analyzed. Finally, the light extraction efficiency of the optimized packaging structure increases about 8.7% and the irradiance increases about 103%.

關鍵字(中)

★ 紫外線LED
★ 反射杯

關鍵字(英)

★ UVC LED
★ LEE
★ Radiant flux
★ Irradiance
★ UV LED
★ reflector

論文目次

目錄
摘要 I
Abstract II
致謝 IV
圖目錄 VIII
表目錄 XII
第一章緒論 1
1-1紫外線相關特性 1
1-2紫外線LED的應用 5
1-3 研究動機與目的 8
1-4 論文大綱 15
第二章基礎原理 16
2-1 基本原理 16
2-1-1 直線傳播 16
2-1-2 反射定律 17
2-1-3 折射定律 18
2-1-3 光線追跡 19
2-2 輻射度學 19
第三章提高封裝光萃取效率與輻照度之研究 21
3-1 LED光萃取效率 21
3-1-1功率轉換效率 22
3-1-2內部量子效率 22
3-1-3外部量子效率 23
3-1-4光萃取效率 23
3-2提高LED 封裝光萃取效率 26
3-3提高LED 封裝照度 29
3-4小結 36
第四章市場各式封裝分析 37
4-1封裝分類 37
4-1-1平面基板類型 38
4-1-2凹杯基板類型 40
4-2各封裝光電特性分析 41
4-3成本及製程分析 46
4-4小結 49
第五章元件設計與製作 50
5-1原物料簡介 50
5-2製程簡介 53
5-3量測方式簡介 55
5-4光電特性分析 58
5-5小結 61
第六章結論 62
參考文獻 63

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指導教授

孫慶成楊宗勳余業緯(Ching-Cherng Sun Tsung-Hsun Yang Yeh-Wei Yu)

審核日期

2021-7-19

推文