Effects of Host Doping on Spectral and Long-Lasting Properties of Sm^(3+)-Doped Y_2O_2S  

作　　者：姚康 王明文 刘世香 张栌丹 李文军 

机构地区：[1]Department of Applied Chemistry, College of Science and Applied Science, University of Science and Technology Beijing

出　　处：《Journal of Rare Earths》2006年第5期524-528,共5页稀土学报（英文版）

基　　金：Project supported bythe Foundation of USTB,China

摘　　要：Gd- or Lu-doped long afterglow red phosphor Y2O2S：Sm^3＋ was synthesized using the high temperature flux fusion method. The obtained phosphors were analyzed using X-ray diffraction to determine the crystal structure, and the phase analyses show that the product is in single phase. The luminescence spectra and decay curve were measured on a Hitachi F-4500 fluorescence spectrophotometer. The decay time was determined on an ST-900PM weak light photometer. The analyses show that host doping of Lu improves both luminescence and decay time of the materials. The concentration of doped Lu and Sm was varied in order to determine the optimal condition and to synthesize the product with the best properties. The mechanism of the long afterglow was also briefly discussed.Gd- or Lu-doped long afterglow red phosphor Y2O2S：Sm^3＋ was synthesized using the high temperature flux fusion method. The obtained phosphors were analyzed using X-ray diffraction to determine the crystal structure, and the phase analyses show that the product is in single phase. The luminescence spectra and decay curve were measured on a Hitachi F-4500 fluorescence spectrophotometer. The decay time was determined on an ST-900PM weak light photometer. The analyses show that host doping of Lu improves both luminescence and decay time of the materials. The concentration of doped Lu and Sm was varied in order to determine the optimal condition and to synthesize the product with the best properties. The mechanism of the long afterglow was also briefly discussed.

关 键 词：yttrium oxysulfide long-lasting properties host doping rare earths 

分 类 号：O482.31[理学—固体物理]