Luminescence properties and energy transfer in La6Ba4(SiO4)6F2:Ce3+,Tb3+ phosphors

被引：65
作者：
Guo, Qingfeng [1 ]
Liao, Libing [1 ]
Xia, Zhiguo [1 ]
机构：
[1] China Univ Geosci, Sch Mat Sci & Technol, Beijing 10083, Peoples R China
来源：
JOURNAL OF LUMINESCENCE | 2014年 / 145卷
关键词：
Phosphors; Luminescence; Apatite; Hexagonal; Energy transfer; CE3+; TB3+; EU2+;
D O I：
10.1016/j.jlumin.2013.07.035
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A series of new luminescent emission-tunable phosphors La6Ba4(SiO4)(6)F-2:Ce3+,Tb3+ with apatite structure have been synthesized by a high temperature solid-state reaction. X-ray diffraction, photoluminescence (PL) emission and excitation spectra, lifetime, as well as the effect of Tb3+ concentration were employed to characterize the resulting samples. The PL spectrum of La6Ba4(SiO4)(6)F-2:Ce3+,Tb3+ phosphor contains both the asymmetric broad-band blue emission (Ce3+ ion) and the line-type green emission (Tb3+ ion). The increased Tb3+ concentration induced the emitting colors to shift from blue to green region by the naked eye. Meanwhile, the energy transfer between Ce3+ and Tb3+ is thoroughly investigated, and the energy-transfer efficiency from Ce3+ to Tb3+ ion is also calculated. The results indicated that these phosphors could be considered as double emission phosphors for n-UV excited white light-emitting diodes. (C) 2013 Elsevier B.V. All rights reserved.
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页码：65 / 70
页数：6
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