High-thermal-stability white light-emitting-diodes employing broadband glass phosphor

Wood Hi Cheng, Li Yin Chen, Wei Chih Cheng

研究成果: Conference contribution同行評審

4 引文 斯高帕斯(Scopus)

摘要

We report the high-thermal-stability white light-emitting-diodes (WLEDs) employing broadband glass phosphors. The broadband glass phosphors were fabricated by sintering the mixture of multiple phosphors and SiO2-based glass (SiO2-Na2O-Al2O3-CaO) at 680?. Y3Al5O12:Ce3+ (YAG), Lu3Al5O12:Ce3+ (LuAG), and CaAlSiN3: Eu2+ (Nitride) phosphor crystals were chosen as the yellow, green, and red emitters of the glass phosphors, respectively. The results showed that the broadband phosphors exhibited high quantum-yield of 54% and color-rendering index (CRI) of 90. The lumen degradation, chromaticity shift, and transmittance loss in the broadband glass-based WLEDs under thermal aging temperature at 150, 250, 350 and 450? were also presented and compared with those of silicone-based WLEDs under thermal aging temperature at 150 and 250°C. The results demonstrated that the broadband glass-based WLEDs exhibited better thermal stability in lumen degradation, chromaticity shift, and transmittance loss than the silicone-based WLEDs. The excellent thermal stability of the broadband glass-based WLEDs with high CRI is essentially beneficial to the applications for next-generation solid-state indoor lighting, especially in the area where high power and absolute reliability are required.

原文English
主出版物標題Thirteenth International Conference on Solid State Lighting
編輯Jianzhong Jiao, Matthew H. Kane, Nikolaus Dietz, Jian-Jang Huang
發行者SPIE
ISBN(電子)9781628412178
DOIs
出版狀態Published - 2014
事件13th International Conference on Solid State Lighting - San Diego, United States
持續時間: 20 8月 201421 8月 2014

出版系列

名字Proceedings of SPIE - The International Society for Optical Engineering
9190
ISSN(列印)0277-786X
ISSN(電子)1996-756X

Conference

Conference13th International Conference on Solid State Lighting
國家/地區United States
城市San Diego
期間20/08/1421/08/14

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