Luminescent properties of long lasting phosphor Ca2MgSi2O7:Eu2+

被引：31
|
作者：
Gong, Yu [1 ]
Wang, Yuhua [1 ,2 ]
Jiang, Ziqiang [1 ]
Xu, Xuhui [1 ]
Li, Yanqin [1 ]
机构：
[1] Lanzhou Univ, Sch Phys Sci & Technol, Dept Mat Sci, Lanzhou 730000, Peoples R China
[2] Lanzhou Univ, Minist Educ, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2009年 / 44卷 / 09期
关键词：
Inorganic compounds; Optical properties; Defects; EARTH IONS; EU2+; DY3+; MECHANISM; PHASES; SRAL2O4; ENERGY; EU-2+;
D O I：
10.1016/j.materresbull.2009.05.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Long after glow phosphors (Ca1-xEux)(2)MgSi2O7 (0.002 <= x <= 0.02) were prepared by solid-state reactions under a weak reductive atmosphere. X-ray diffraction pattern, photoluminescence spectra, decay curve, afterglow spectra and thermoluminescence curves were investigated. The phosphors showed two emission peaks when they were excited by 343 nm, due to two types of Eu2+ centers existing in the Ca2MgSi2O7 lattice. However, only one emission peak can be found in their afterglow spectra. Energy transfer between Eu2+ ions in inequivalent sites was found. A possible mechanism was presented and discussed. The afterglow decay time of Ca1.998MgSi2O7:Eu-0.002 was nearly 12.5 h which means it was a good long lasting phosphor. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1916 / 1919
页数：4
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