文献类型：期刊文献

中文题名：掺杂对Y_2O_2S:Eu长余辉特性的影响及长余辉发光机理

英文题名：Effect of Dopants on Long Afterglow Properties of Y_2O_2S:Eu Phosphor and Its Long Afterglow Mechanism

作者：袁双龙[1];杨云霞[1];徐志珍[1];方斌[2]

机构：[1]华东理工大学无机化学系,上海200237;[2]华东理工大学材料学院,上海200237

年份：2004

卷号：19

期号：3

起止页码：523

中文期刊名：无机材料学报

外文期刊名：Journal of Inorganic Materials

收录：CSTPCD;;EI(收录号：2004328299609);Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：上海市光科技专项基金(015261050)

语种：中文

中文关键词：长余辉;Y2O2S:Eu;掺杂;发光机理

外文关键词：long afterglow; yttrium oxysulfide; dopant; mechanism

摘要：通过发射光谱、XRD、相对亮度、余辉衰减曲线和热释光谱的测量,研究了在Y_2O_2S:Eu体系中掺杂Mg^(2+)、Ca^(2+)、Sr^(2+)、Ba^(2+)、Ti^(4+)对荧光体的发光与长余辉特性的影响.结果表明,这些离子的掺杂不影响发射光谱和晶体结构,但显著地影响相对亮度和长余辉特性.它的长余辉衰减过程由一快过程和一慢过程组成,很好地符合指数衰减方程。Mg、Ti共掺杂荧光体的相对亮度和长余辉性能优于单掺杂,与Mg、Ti的含量比有关.根据实验结果,探讨了Y_2O_2S:Eu体系荧光体的长余辉发光机理.
Y2O2S:Eu phosphors doped with Mg2+, Ca2+, Sr2+, Ba2+, Ti4+ were studied by PL spectra, XRD, decay curve, relative brightness and TL spectra. The results show that those dopants do not change crystal structure of the host, but influence afterglow properties and relative brightness, and the decay curve comprised of a fast and a slow part is well exponential. Codopants of Mg and Ti suggest the longer afterglow duration than single ion doping, being dependent on their contents. The long afterglow mechanism of Y2O2S:Eu host materials was discussed on the basis of experimental results.