矽烷改質奈米二氧化鋯/矽樹脂複合材料之製備
及其應用於LED封裝材料之評估

本研究目的為開發出高折射率且高信賴度的新型LED(light-emitting diode)封裝材料。利用溶膠凝膠法，在溶液中合成高折射率二氧化鋯無機顆粒，使用醋酸為螯合劑來控制二氧化鋯的顆粒大小，並利用矽烷修飾二氧化鋯表面使其有機化，最後混入商用矽樹脂中得到高透明度及高折射率之新型矽烷改質二氧化鋯/矽樹脂複合材料，並將此做為LED原件之封裝材料，藉由此複合材料折射率的提升，得到較高的出光亮度。流明量測結果顯示，LED出光亮度由原本商用矽樹脂封裝的4.11 lm提升至以矽烷改質二氧化鋯/矽樹脂為封裝材料的4.52 lm，顯示藉由導入矽烷改質二氧化鋯提高封裝材料折射率，能有效增加10% LED的出光效率。由動態機械分析儀(DMA)及熱機械分析儀(TMA)的結果，我們發現經過矽烷改質的二氧化鋯，能更有效降低處於高低溫差環境下釋出之應力。將此特性應用於LED封裝材料，可以增進LED在溫度環境劇烈變化下之耐用性。溫度衝擊試驗結果顯示，以矽烷改質二氧化鋯/矽樹脂作為LED封裝材料，能改善目前商用矽樹脂在高低溫差變化下，內部熱應力問題導致裝置提早損壞的情況，因此可以提升LED的信賴度。

關鍵字

LED封裝材料；無機/有機複合材料；二氧化鋯；矽烷；表面改質

並列摘要

In this research, the main purpose is the development of high refractive index and reliable encapsulating material of light emitting diodes (LEDs). Zirconium dioxide (ZrO2) nanoparticles with high refractive index are synthesized by sol-gel reaction of zirconium propoxide in suitable solution. Acetic acid is used as chelating agent to control the particle size of ZrO2 and then the surface of ZrO2 is modified by silane molecule to provide the linkages between the water phase of ZrO2 and the oil phase of silicone resin. The ZrO2-silane particles are subsequently mixed with commercial-grade silicone resin to obtain the ZrO2-silane/silicone hybrid materials (ZrO2-silane/AB). These high-refractive-index ZrO2-silane/AB hybrids are used as encapsulating materials to improve the luminous flux of the LEDs. From the result of the luminous flux measurement, the LED encapsulated with the pure silicone resin only has luminous flux of 4.11 lm. After being encapsulated with the ZrO2-silane/AB hybrid, the luminous flux of the LED raises to 4.52 lm, which reveals that increasing in the refractive index of the encapsulating materials by the incorporation of the ZrO2-silane can improve the luminous flux of the LED. The results of Dynamic Mechanical Analyzer and Thermal Mechanical Analyzer on ZrO2-silane/AB hybrids tell us that the ZrO2-silane/AB hybrids have lower thermal stress than that of ZrO2 /AB hybrids. We believe that encapsulating materials with lower thermal stress have a better mechanical resistance against the thermal shock .The result of thermal shock experiment also shows that LED encapsulated with ZrO2-silane/AB hybrids have better reliability than the ZrO2 /AB hybrids.

並列關鍵字

LED encapsulating materials ； organic/inorganic hybrid materials ； zirconium dioxide ； silanes ； surface modification

參考文獻

[2] 張鈞傑,"提升高功率白光發光二極體光取出效率封裝技術之研究",國立臺灣大學光電工程學研究所碩士班碩士論文, 2008.

[8] 林柏廷,"二氧化鋯非水解型溶膠凝膠塗佈管柱的製備及其於毛細管電層析分離蛋白質的應用",台灣大學化學研究所碩士班碩士論文, 2007.

[26] 謝致遠,"改質奈米二氧化鋯/高分子抗靜電鍍膜之製備與性質研究",淡江大學化學工程與材料工程學系碩士班碩士論文, 2008.

1998, 3279:p. 17-27

[6] Silicone and Epoxy data are available at http://www.dowcorning.com/LED

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矽烷改質奈米二氧化鋯/矽樹脂複合材料之製備及其應用於LED封裝材料之評估

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