Sensitized luminescence and energy transfer in Ce3+ and EU2+ codoped calcium magnesium chlorosilicate

被引：67
作者：
Lin, H
Liu, XR
Pun, EYB
机构：
[1] City Univ Hong Kong, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China
[2] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Changchun 130022, Peoples R China
来源：
OPTICAL MATERIALS | 2002年 / 18卷 / 04期
关键词：
calcium magnesium chlorosilicate; sensitized luminescence; Ce3+; EU2+; energy transfer;
D O I：
10.1016/S0925-3467(01)00179-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ce3+ and Eu2+ ions codoped calcium magnesium chlorosilicate [Ca8Mg(SiO4)(4)Cl-2] phosphors have been synthesized and characterized. Intense bluish-green light was observed under ultraviolet and blue light excitations. The diffuse reflection, excitation and emission spectra of Ca8Mg(SiO4)(4)Cl-2:Ce3+,Eu2+ were measured at room temperature, and enhancement of Eu2+ emission was confirmed. The fluorescence lifetimes of Ce3+ were measured, and the mechanism of nonradiative energy transfer from Ce3+ to Eu2+ is found to be electric dipole-dipole interaction. The probabilities and efficiencies of nonradiative energy transfer were also calculated, and the results indicate that the efficiency can be as high as 86% in this material system. (C) 2002 Published by Elsevier Science B.V.
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页码：397 / 401
页数：5
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