A new-generation color converter for high-power white LED: transparent Ce3+:YAG phosphor-in-glass
A new-generation color converter for high-power white LED: transparent Ce3+:YAG phosphor-in-glass
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用于高功率白光 LED 的新一代颜色转换器：透明 Ce3 :YAG 玻璃荧光粉
DOI：
10.1002/lpor.201300140
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发表时间：
2014-01-01
影响因子：
11
通讯作者：
Wang, Yuansheng
中科院分区：
文献类型：
--
作者：
Zhang, Rui;Lin, Hang;Wang, Yuansheng
目前，主要的商业白色发光二极管（WLED）是由InGaN蓝色发光芯片和分散在有机环氧树脂或有机硅中的Ce 3+：Y3 Al 5 O 12（Ce：YAG）黄色磷光体制成的磷光体转换LED。然而，大功率WLED中的有机粘合剂可能容易老化，并且由于从芯片发出的累积热量而变黄，这对WLED性能（例如发光效率和颜色协调）产生不利影响，并且因此降低其长期可靠性以及寿命。在此，一种创新的发光材料：透明的Ce：YAG荧光粉在玻璃（PiG）无机颜色转换器，开发，以取代传统的树脂/硅基荧光粉转换器的大功率WLED的建设。基于PIG的WLED不仅表现出优异的耐热性和耐湿性特性，而且还表现出优异的上级光学性能，其发光效率为124 lm/W，相关色温为6674 K，显色指数为70。这种易于制造、低成本和长寿命的WLED有望成为新一代室内外大功率照明光源。
Currently, the major commercial white light-emitting diode (WLED) is the phosphor-converted LED made of the InGaN blue-emitting chip and the Ce3+:Y3Al5O12 (Ce:YAG) yellow phosphor dispersed in organic epoxy resin or silicone. However, the organic binder in high-power WLED may age easily and turn yellow due to the accumulated heat emitted from the chip, which adversely affects the WLED properties such as luminous efficacy and color coordination, and therefore reduces its long-term reliability as well as lifetime. Herein, an innovative luminescent material: transparent Ce:YAG phosphor-in-glass (PiG) inorganic color converter, is developed to replace the conventional resin/silicone-based phosphor converter for the construction of high-power WLED. The PiG-based WLED exhibits not only excellent heat-resistance and humidity-resistance characteristics, but also superior optical performances with a luminous efficacy of 124 lm/W, a correlated color temperature of 6674 K and a color rendering index of 70. This easy fabrication, low-cost and long-lifetime WLED is expected to be a new-generation indoor/outdoor high-power lighting source.