Luminescence and energy transfer of a color tunable phosphor: Ba2CaLa1-xMx(PO4)3 (M=Dy, Tm, Eu) for warm white UV LEDs

被引:20
作者
Wang, Jiyou [1 ]
Wang, Chao [1 ]
Feng, Yang [1 ]
Liu, Hongmei [1 ]
机构
[1] Beijing Univ Technol, Coll Appl Sci, Beijing 100022, Peoples R China
基金
中国国家自然科学基金;
关键词
White LED; Energy transfer; Photoluminescence; Ba2CaLa1-x-y-z(PO4)(3):xDy(3+)-yTm(3+)-zEu(3+); LIGHT EMITTING DIODES; DY3+ PHOSPHOR; EMISSION; TB3+; PHOTOLUMINESCENCE; PROPERTY;
D O I
10.1016/j.ceramint.2015.06.056
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A series of Dy3+-, Tm3+-, Eu3+ co-activated Ba2CaLa(PO4)(3) phosphors were synthesized via a standard solid state reaction under normal ambient air, and the emission colors could be tuned from blue to white and then to red. It was discovered that the energy is transferred from Tm3+ to Dy3+ by directly observing overlap of the excitation spectrum of Dy3+ and the emission spectrum of Tm3+ and Dy3+. By utilizing the principle of energy transfer, we have demonstrated that with appropriate tuning of activator content, Ba2CaLa1-x-y-z(PO4)(3):xDy(3+)-yTm(3+)-zEu(3+) phosphors exhibit great potential for use as single-component phosphors for warm white ultraviolet light-emitting diodes (UV LEDs). (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码:11592 / 11597
页数:6
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