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.

引用

页码：417 / 422

页数：5

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