Spectroscopic evaluation of a white light phosphor for UV-LEDs-Ca2NaMg2V3O12:Eu3+
Spectroscopic evaluation of a white light phosphor for UV-LEDs-Ca2NaMg2V3O12:Eu3+
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DOI：
10.1149/1.2077328
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发表时间：
2005-01-01
影响因子：
3.9
通讯作者：
Beers, WW
中科院分区：
文献类型：
--
作者：
Setlur, AA;Comanzo, HA;Beers, WW
钒酸盐石榴石，Ca 2NaMg 2 V3 O 12，激活与三价铕的发光进行评估和讨论作为一个潜在的紫外发光二极管（UV-LED）荧光粉。该单一磷光体能够将UV-LED的紫外发射转换成具有良好亮度和显色指数的白色光。我们已经评估了这种材料在高温下的发光性能，因为典型LED的结温可以超过100摄氏度。在T > 100 ℃时，该磷光体存在显著的热猝灭和发射色移。这是由于能量迁移和转移到非辐射陷阱和基质晶格内的Eu 3+。本文还讨论了这种荧光粉在基于UV-LED的光源中的应用。(c)2005年电化学学会。All rights reserved.
The luminescence of the vanadate garnet, Ca2NaMg2V3O12, activated with trivalent europium is evaluated and discussed as a potential ultraviolet light-emitting diode (UV-LED) phosphor. This single phosphor is capable of converting the ultraviolet emission of a UV-LED into white light with good luminosity and color-rendering index. We have evaluated the luminescence of this material at elevated temperatures, because the junction temperatures of typical LEDs can be greater than 100 degrees C. There is significant thermal quenching of this phosphor and emission color shift at T > 100 degrees C. This is attributed to energy migration and transfer to nonradiative traps and Eu3+ within the host lattice. These implications on the use of this phosphor in UV-LED based light sources is also discussed. (c) 2005 The Electrochemical Society. All rights reserved.