Pr3+、Ce3+共掺LiYSiO4闪烁体的发光性能  

Luminescence Properties of Pr3+, Ce3+ Codoped LiYSiO4 Scintillator

作　　者：张鹏[1] 杜飞[1] 栗茹 潘尚可[1] 潘建国[1] 陈红兵[1] ZHANG Peng;DU Fei;LI Ru;PAN Shangke;PAN Jianguo;CHEN Hongbing(The School of Materials Science and Chemical Engineering, Ningbo University, Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province, Ningbo 315211, Zhejiang, China)

机构地区：[1]宁波大学材料科学与化学工程学院浙江省光电探测材料及器件重点实验室

出　　处：《硅酸盐学报》2018年第4期524-528,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金面上项目(11475242,51272263);国家自然科学基金项目(61775108);宁波大学王宽诚基金项目

摘　　要：采用固相合成法制备了LiY0.99-xCe0.01PrxSiO4（x=0～5％）系列化合物，采用X射线粉末衍射、紫外-可见漫反射光谱、光致发光光谱、X射线激发发射光谱以及光致发光衰减曲线对其系列化合物的物相、发光性能进行了表征。结果表明：在煅烧温度为1100℃所制备的样品均为纯LiYSiO4相；Ce^3＋的吸收峰位于325和364nm。Pr^3＋、Ce^3＋共掺时，由于Pr^3＋-Ce^3＋之间的能量传递作用，在250nm波长的紫外光激发下，在400nm处产生了Ce^3＋的特征发射峰。随着Pr^3＋掺杂量的增加，Ce^3＋在X射线激发下的发光强度逐渐下降，但Ce^3＋在320nm的波长激发下的衰减逐渐变快。A series of LiY0.99-xCe0.01PrxSiO4 （x=0-5%） compounds were synthesized via solid state reactions. The phase and luminescence properties of the compounds were characterized by X-ray powder diffraction, UV-Vis diffuse reflectance spectroscopy, photoluminescence spectroscopy, X-ray excited luminescence spectroscopy and photoluminescence decay curves, respectively. The results indicate that all the samples prepared at 1 100℃ is a pure LiYSiO4 phase. The absorption peaks of Ce^3＋ are located at 325 nm and 364 nm, respectively. In Ce^3＋ and Pr^3＋ co-doping scintillators, remarkable emission bands of Ce^3＋ at 400 nm appear when excited by 250 nm UV light due to the presence of energy transfer between Pr^3＋ and Ce^3＋. The luminescence intensity of Ce^3＋ gradually decreases under X-ray excitation, but the decay time of Ce^3＋ becomes quicker under 320nm light excitation when Pr^3＋ dopant content increases.

关 键 词：闪烁体 镨铈共掺 发光性能 衰减时间 

分 类 号：TQ174.75[化学工程—陶瓷工业]