材料科学与工程学报2013，Vol.31Issue(1)：40-45,6.
长余辉发光材料SrAl2O4∶Eu2+,Dy3+光谱分析及发光机理
Spectrum Analysis and Phosphorescence Mechanism of Long Afterglow Phosphors SrAl2O4 ∶ Eu2+, Dy3+
摘要
Abstract
Sr0.96 Al2 O4 ∶ Eu0.02, Dy0.02, B0.085 , as a long afterglow luminescent material, was synthesized via solid-state reaction and different temperature annealing. The phosphors were then characterized using X-ray diffraction, X-ray photoelectron spectroscopy, fluorescence spectrophotometer and thermal luminescent spectroscopy. The simulations for the afterglow curves and thermal luminescent spectra suggest the sample suffered the 1350 ℃/4h second annealing having the longest decay time constant and highest traped electronic concentration, and thus generatinge the highest brightness within the whole experiment time. Further more, the rapid and slow exponential decay components can be attributed to the releases of the electrons from Vo and DySr traps, respectively. The thermal luminescent spectra from the curve fitting technique indicate that the lower the kinetic order is, the more remarkable the localized property of the trapped electron will be. A localized state can be formed under the conduction band and the trap depth can subsequently be reduced. At the same time, the frequency factor becomes small leading the life time of the electron in the trap to increases.关键词
锶铝酸盐/长余辉发光材料/发光机理Key words
strontium aluminate/long afterglow materials (phosphorescence mechanism分类
化学化工引用本文复制引用
徐超,卢佃清,刘学东..长余辉发光材料SrAl2O4∶Eu2+,Dy3+光谱分析及发光机理[J].材料科学与工程学报,2013,31(1):40-45,6.基金项目
江苏省高校自然科学研究计划资助项目(06KJD430014),淮海工学院校内科研课题资助项目(Z2011040) （06KJD430014）
