Photo-luminescence properties and thermo-luminescence curve analysis of a new white long-lasting phosphor: Ca_2MgSi_2O_7:Dy^(3+)  

作　　者：林林 赵仲华 张慰萍 郑志强 尹民 

机构地区：[1]Department of Physics,Fujian Normal University [2]Department of Physics,University of Science and Technology of China [3]Department of Physics,the City College of the City University of New York

出　　处：《Journal of Rare Earths》2009年第5期749-752,共4页稀土学报（英文版）

基　　金：Project supported by the Young Scientists' Innovation Foundation of Fujian Province (2007F3027);the Natural Science Foundation of Fujian Province of China (A0510014);the Science Foundation of the Department of Science and Technology of Fujian Province of China (2006F5025);the Science Foundation of the Educational Department of Fujian Province of China (JB08063);the Special Science Foundation for Key Research of Fujian Province (2007HJ0004-2)

摘　　要：A white long-lasting phosphor Ca2MgSi2O7:Dy3+ was prepared by the solid-state reaction. A strong band peaked at 260 nm was shown in the excitation spectrum of 578 nm emission, which might be attributed to the oxygen deficiency of the host. After irradiated with 254 nm for 4 min, the white afterglow of the sample could be seen for 3 h. Moreover, the depths and frequency factors of trap centers were calculated from the thermo-luminescence curve of the sample, which indicated that the trap centers corresponding to the 414 K band were more helpful to the long-lasting phosphorescence.A white long-lasting phosphor Ca2MgSi2O7:Dy3+ was prepared by the solid-state reaction. A strong band peaked at 260 nm was shown in the excitation spectrum of 578 nm emission, which might be attributed to the oxygen deficiency of the host. After irradiated with 254 nm for 4 min, the white afterglow of the sample could be seen for 3 h. Moreover, the depths and frequency factors of trap centers were calculated from the thermo-luminescence curve of the sample, which indicated that the trap centers corresponding to the 414 K band were more helpful to the long-lasting phosphorescence.

关 键 词：white long-lasting phosphor SILICATE DYSPROSIUM THERMO-LUMINESCENCE rare earths 

分 类 号：TG146.45[一般工业技术—材料科学与工程]