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系統識別號 U0002-2007201420250300
中文論文名稱 漸變折射層於氮化鎵發光二極體可行性之評估
英文論文名稱 Evaluating the feasibility of applying graded-refractive-index layers in GaN light-emitting diodes
校院名稱 淡江大學
系所名稱(中) 化學工程與材料工程學系碩士班
系所名稱(英) Department of Chemical and Materials Engineering
學年度 102
學期 2
出版年 103
研究生中文姓名 趙思涵
研究生英文姓名 Ssu-Han Chao
學號 601401176
學位類別 碩士
語文別 中文
口試日期 2014-06-19
論文頁數 53頁
口試委員 指導教授-許世杰
委員-李宗憲
委員-葉禮賢
委員-張朝欽
中文關鍵字 發光二極體  漸變折射層 
英文關鍵字 Light Emitting Diode  Graded Refractive Index  Light Extraction Efficiency 
學科別分類
中文摘要 本論文是利用TracePro光學軟體,模擬漸變折射層(Graded-refractive-index)應用於氮化鎵發光二極體(GaN-Based LED)之封裝製程,驗證其光通量是否具有提升效果。
研究中我們對氮化鎵發光二極體進行多層封裝來製作複合漸變折射層結構以提升其光萃取效率(Light Extraction efficiency)。由模擬結果得知,相較於傳統之單層封裝膠(n=1.4),具有漸變折射層的封裝結構其光通量最高可以提升8.95%,同時也發現隨著封裝材料的折射率越提高,光通量也會隨之提升。此外,分別模擬不同層數的封裝結構,發現三層和四層的結構其光通量數值相近,由此可知漸變折射層的分層數目和光通量增加量有其極大值。
綜合本研究之模擬結果,可以發現多層漸變折射層複合封裝材料對於改進LED光萃取效率的確有其效果,但應以四層為限度。且最內層和最外層的折射率差值越大越好,尤其是最內層的材料折射率應要在小於氮化鎵材料折射率的情況下儘可能的大,此時效率為最佳。
英文摘要 Utilize TracePro software work in Graded-refractive-index(GRIN) structure for GaN-Based LED encapsulation process. We prove light extraction efficiency related with GRIN.
We use multi-layers encapsulants as Graded-refractive-index(GRIN) structure for LED encapsulants. From simulation results, the light extraction of multi-layers enhance 8.95% than single layer. And also we found encapsulants of refractive index gradually increase, luminous flux will get higher. Besides we find four layers encapsulant structure have maximum value. According to the simulation result, the GRIN layer influence of luminous flux.
論文目次 目錄
致謝 V
目錄 VI
圖目錄 VIII
表目錄 X
第一章 序論 1
1.1 前言 1
1.2 研究動機與目的 2
1.3 漸變折射層之相關文獻回顧 5
1.4 論文架構 9
第二章 理論基礎與原理
2.1發光二極體概述 10
2.2 發光體之光學性質 12
2.2.1 光通量(Luminous,單位記號:Φ) 12
2.2.2 光強度(Luminous intensity,單位記號:I ) 12
2.2.3 照度(Illuminance,單位記號:E ) 13
2.2.4 輝度(Luminance,單位記號:L ) 13
2.3 發光二極體的效率 14
2.4 發光二極體的封裝材料 18
2.4.1 環氧樹脂 19
2.4.2 矽膠 20
2.4.3 漸變折射層 22
2.4.4 奈米粉體–二氧化鈦 24
第三章 實驗軟體
3.1 TracePro 光學模擬軟體簡介 26
第四章 結果分析與討論
4.1封裝材料形狀效應結果與分析 27
4.2雙層漸變折射層之結果與分析 31
4.3三層漸變折射層之結果與分析 34
4.4多層漸變折射層之結果與分析 36
第五章 結論與未來工作
5.1 結論 37
5.2 未來工作 38
參考文獻 39
附錄A實驗流程 44
附錄B實驗材料 51


圖目錄
圖1.1 內部全反射示意圖 4
圖1.2 漸變折射層封裝結構示意圖 4
圖1.3 漸變折射層示意圖 7
圖1.4 光萃取效率與封裝材料折射率關係圖 7
圖1.5 摻有奈米粒子的雙層封裝結構 8
圖1.6 摻有奈米粒子並搭配透鏡雙層封裝結構圖 8
圖2.1照明趨勢發展與發光效率 11
圖2.2外部量子效率示意圖 15
圖2.3 SMD封裝 16
圖2.4 TO can 16
圖2.5高功率封裝LED結構圖 17
圖2.6環氧樹脂固化示意圖 20
圖2.7二氧化鈦晶體結構(a) 金紅石(b) 銳鈦礦 24
圖3.1 TracePro光學模擬軟體 26
圖4.1 光學模擬模型 28
圖4.2 偵測器全收光方式示意圖 ….29
圖4.3 不同形狀封裝材料全收光之模擬結果 29
圖4.4沒有Fresnel loss之模擬結果 30
圖4.5雙層之模擬結果 32
圖4.6雙層折射率差異過大之模擬結果 33
圖4.7三層之模擬結果 35
圖4.8綜合之模擬結果 36
圖A-1實驗流程圖 45
圖A-2封裝膠材料製備流程圖 47
圖A-3 TiO2 Raman光譜圖 48
圖A-4 SMD5050 49
圖A-5打完金線的藍光晶片 49
圖A-6 實驗用的藍光(447 nm)晶片之光譜圖 50
圖A-7 DowCorning OE-7620 50
圖B-1 光學顯微鏡 51
圖B-2 螺旋測微儀 52
圖B-3 光譜儀 52
圖B-4 L-I-V量測系統 53






表目錄
表1.1 漸變折射層之相關文獻回顧 9
表2.1 DowCorning公司各型號的矽膠產品型號 21
表2.2無機奈米粉體的光學性質 23
表4.1 光學模擬之建模條件 28
參考文獻 [1] S. Nakamura, S. Pearton, and G. Fasol, "The blue laser diode: the complete story," Springer, 2000.
[2] J. K. Kim, M. F. Schubert, J. Xi, F. Mont, and E. F. Schubert, "Enhancement of light extraction in GaInN light-emitting diodes with graded-index indium tin oxide layer," Applied Physics Letters, vol. 88, p. 013501, 2006.
[3] J. K. Kim, A. N. Noemaun, F. W. Mont, D. Meyaard, E. F. Schubert, D. J. Poxson, et al., "Elimination of total internal reflection in GaInN light-emitting diodes by graded-refractive-index micropillars," Applied Physics Letters, vol. 93, p. 221111, 2008.
[4] Y.-K. Su, P.-C. Wang, C.-L. Lin, G.-S. Huang, and C.-M. Wei, "Enhanced Light Extraction Using Blue LED Package Consisting of TiO₂-Doped Silicone Layer and Silicone Lens," 2014.
[5] Y. Liu, Z. Lin, X. Zhao, K.-s. Moon, S. Yoo, J. Choi, et al., "High refractive index and transparency nanocomposites as encapsulant for high brightness LED packaging," in Electronic Components and Technology Conference (ECTC), 2013 IEEE 63rd, pp. 553-556, 2013.
[6] M. Ma, F. W. Mont, X. Yan, J. Cho, E. F. Schubert, G. B. Kim, et al., "Effects of the refractive index of the encapsulant on the light-extraction efficiency of light-emitting diodes," Optics express, vol. 19, pp. A1135-A1140, 2011.
[7] Y.-C. Lin, N. Tran, Y. Zhou, Y. He, and F. G. Shi, "Materials challenges and solutions for the packaging of high power LEDs," in Microsystems, Packaging, Assembly Conference Taiwan, 2006. IMPACT 2006. International, pp. 1-4, 2006.
[8] 劉如憙,白光發光二極體製作技術-由晶粒金屬化至封裝第二版: 全華,2001
[9] 鄭景太,高功率LED封裝技術的發展現況-下篇,工業材料雜誌,2009
[10] Y.-H. Lin, J. P. You, Y.-C. Lin, N. T. Tran, and F. G. Shi, "Development of high-performance optical silicone for the packaging of high-power LEDs," Components and Packaging Technologies, IEEE Transactions on, vol. 33, pp. 761-766, 2010.
[11] Y. H. Kim, J.-Y. Bae, J. Jin, and B.-S. Bae, "Sol–Gel Derived Transparent Zirconium-Phenyl Siloxane Hybrid for Robust High Refractive Index LED Encapsulant," ACS applied materials & interfaces, vol. 6, pp. 3115-3121, 2014.
[12] H.-T. Li, C.-W. Hsu, and K.-C. Chen, "A novel high refractive transparent material in LED package applications," in Electronic Materials and Packaging, 2008. EMAP 2008. International Conference on, pp. 309-312, 2008.
[13] B. K. Lee, K. S. Goh, Y. L. Chin, and C. W. Tan, "Light emitting diode with gradient index layering," US6717362 B1, 2004.
[14] F. W. Mont, J. K. Kim, M. F. Schubert, E. F. Schubert, and R. W. Siegel, "High refractive index TiO2 nanoparticle loaded encapsulants for light-emitting diodes," Journal of applied physics, vol. 103, p. 083120, 2008.
[15] R.-y. YU, S.-z. JIN, P. LIANG, S.-y. CEN, and L. WANG, "Monte Carlo simulation on leds graded-refractive-index-encapsulation," Acta Photonica Sinica, vol. 39, pp. 2200-2203, 2010.
[16] P.-C. Wang, C.-L. Lin, and Y.-K. Su, "Enhancement of Light Extraction Efficiency in GaN-Based Blue Light-Emitting Diodes by Doping TiO2 Nanoparticles in Specific Region of Encapsulation Silicone," Japanese Journal of Applied Physics, vol. 52, p. 08JG15, 2013.
[17] 王品超, "以二氧化鈦奈米粒子摻雜矽膠提升封裝後藍色發光二極體之光取出效率" ,崑山科技大學光電工程研究所學位論文,2010
[18] 張啟峰,"透過摻雜奈米粉體封裝技術以提升發光二極體之光取出特性" ,崑山科技大學光電工程研究所學位論文,2010
[19] 許世杰, 節能照明技術—淺談發光二極體,科學月刊,2014.
[20] 郭浩中,郭守義, LED 原理與應用第三版: 五南文化事業,2013
[21] E. F. Schubert, T. Gessmann, and J. K. Kim, Light emitting diodes, Wiley Online Library, 2005.
[22] 鄭景太,高功率 LED 封裝技術的發展現況 (上篇),工業材料雜誌, 2008
[23] H.-H. Park, X. Zhang, Y. Cho, D.-W. Kim, J. Kim, K. W. Lee, et al., "Wafer-scale surface roughening for enhanced light extraction of high power AlGaInP-based light-emitting diodes," Optics Express, vol. 22, pp. A723-A734, 2014.
[24] 許嘉紋, 黃淑禎, 陳凱琪, LED元件構裝用高折射率透明封裝材料技術,工業材料雜誌, 2008
[25] X. Liu and W. Fang, "Analysis on the failure modes and mechanisms of LED packaging," in Electronic Packaging Technology and High Density Packaging (ICEPT-HDP), 2012 13th International Conference on, pp. 1500-1502, 2012.
[26] 黃淑禎, 許嘉紋, 林志浩, 陳文彬, 張語, 陳凱琪, et al.,發光二極體 (LED) 構裝材料技術介紹與發展趨勢,工業材料雜誌,2012
[27] Dow Corning MSDS. Available: http://www.dowcorning.com/applications/search/products/
[28] J.-g. Liu and M. Ueda, "High refractive index polymers: fundamental research and practical applications," Journal of Materials Chemistry, vol. 19, pp. 8907-8919, 2009.
[29] 楊博仁, 劉榮昌, 鍾明樺, 陳建明,高折射率添加劑於 LED 封裝之應用,工業材料雜誌, 2012
[30] J.-S. Kim, S. Yang, and B.-S. Bae, "Thermally stable transparent sol− gel based siloxane hybrid material with high refractive index for light emitting diode (LED) encapsulation," Chemistry of Materials, vol. 22, pp. 3549-3555, 2010.
[31] 劉榮昌, 鍾明樺, 陳建明,有機/無機混成奈米複合物於 LED 封裝的技術發展趨勢,工業材料雜誌,2012
[32] 呂宗昕,吳偉宏,奈米科技與二氧化鈦光觸媒,科學發展, 2004
[33] 周開平,陳郁文,二氧化鈦光觸媒的應用,科學發展,2005
[34]http://gsmat10002.weebly.com/2010827687212703741426448260092604420809386512080320214303403537335336122893506920316332872503329992.html.
[35] P. Tao, Y. Li, A. Rungta, A. Viswanath, J. Gao, B. C. Benicewicz, et al., "TiO2 nanocomposites with high refractive index and transparency," Journal of Materials Chemistry, vol. 21, pp. 18623-18629, 2011.
[36] Y. Liu, Z. Lin, X. Zhao, C.-C. Tuan, K.-S. Moon, S. Yoo, et al., "High Refractive Index and Transparent Nanocomposites as Encapsulant for High Brightness LED Packaging," vol. PP, 2014.
[37] M. Vishwas, K. Narasimha Rao, and R. Chakradhar, "Influence of annealing temperature on Raman and photoluminescence spectra of electron beam evaporated TiO2 thin films," Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, vol. 99, pp. 33-36, 2012.
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