利用披覆二氧化矽增強白光發光二極體之玻璃基材螢光轉換性能

Enhanced Photo-Illumination Performance of SiO2 Coated-Phosphor in Glass Matrix for White Light-Emitting Diodes

蔡俊欽(Chun-Chin Tsai)

《光學工程》 122期 (2013/07) Pp. 26-31

摘要

一些文獻報告中提到溶膠-凝膠（sol-gel）處理方法，而且其SiO2 二氧化矽披覆方法也可以用於Ce^3+：YAG 螢光粉的耐熱可靠性增強，提高量子效率和光學特性的效果。這項研究發現比較未上披覆層的玻璃螢光體（CeYDG），及有披覆層的溶膠凝膠玻璃螢光體（SGCeYDG），提高光提取效率的玻璃螢光粉量子效率增加了4.7％。在熱可靠性測試部分，進行高溫老化450，350，250 和150℃實驗，並比較了流明損失和色度座標飄移（ΔE）。結果清楚地表示，SGCeYDG展現出在流明損失和色度座標飄移上有更好的熱穩定性。新一代高性能熱穩定玻璃，已具備有開發下一代固態照明產業，在大功率LED模組高操作溫度，和必要的熱可靠性等所需要的關鍵能力。

關鍵字

老化測試 ； 螢光玻璃 ； 溶膠-凝膠 ； 螢光粉

並列摘要

It was reported that sol-gel processed SiO2-coating effects of Ce^3+: YAG phosphor on and thermal reliability enhancements in terms of quantum efficiency and optical characteristics. This study found improved light extraction efficiencies of glass phosphor, and increased quantum efficiency 4.7% of SGCeYDG in comparison to un-coated CeYDLTG. In the thermal reliability tests, Lumen degradation and chromaticity shift (ΔE) in the SGCeYDG thermaly aged at 450, 350, 250 and 150℃, respectively, are also presented and compared with those of CeYDG. The results clearly demonstrated that the SGCeYDG exhibited better thermal stability on lumen degradation, and chromaticity shift than CeYDG's. The navel high performance thermal-stable glass has been essentially critical to the application areas of LED modules where high-power leading high-operation-temperature and absolute thermal reliability are required for developing the next-generation solid-state lighting industry.

並列關鍵字

Aging test ； Glass phosphor ； Sol-gel ； Ce:YAG