Energy transfer in Y3Al5O12:Ce3+, Cr3+ and Y3Al5O12:Ce3+, Pr3+, Cr3+ phosphors

被引：0
|
作者：
Wang L. [1 ,2 ]
Zhang X. [1 ]
Hao Z.-D. [1 ]
Luo Y.-S. [1 ]
Wang X.-J. [3 ]
Zhang J.-H. [1 ]
机构：
[1] Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033
[2] Graduate School of Chinese Academy of Sciences
[3] Department of Physics, Georgia Southern University, Statesboro
来源：
Faguang Xuebao/Chinese Journal of Luminescence | 2011年 / 32卷 / 05期
关键词：
Energy transfer; WLED; YAG;
D O I：
10.3788/fgxb20113205.0417
中图分类号：
学科分类号：
摘要：
Triply doped Y3Al5O12:Ce3+, Pr3+, Cr3+ phosphors with Ce3+ and Pr3+ substituting for Y3+ sites and Cr3+ substituting for Al3+ site are prepared by solid state reaction. A broad emission spectrum composed a yellow emission band from Ce3+, a light red emission line from Pr3+ and a deep red emission line from Cr3+, which are generated through energy transfer among the dopant ions. The study of photoluminescence and fluorescence decay indicates that there exist energy transfers from Ce3+→Cr3+ and Ce3+→Pr3+→Cr3+. The effect of energy transfer on relative intensities of the three emissions is analyzed. A white LED is fabricated using a blue LED chip coated with the triply doped phosphor and shows a color rendering index of 81.4 and 80.4, respectively.It is higher than that either using Ce3+ and Cr3+ doubly doped phosphor or Ce3+ singly doped phosphors.
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页码：417 / 422
页数：5
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