纳米粉体Er,Yb:(YGd)_2O_3的制备及其发光性质  

Preparation and Luminescence Property of Er,Yb:(YGd)_2O_3 Nano-powder

作　　者：付美荣[1] 朱忠丽[1] 

机构地区：[1]长春理工大学化学与环境工程学院,长春130022

出　　处：《硅酸盐学报》2016年第12期1787-1791,共5页Journal of The Chinese Ceramic Society

基　　金：吉林省科技发展计划(20120223)

摘　　要：用柠檬酸作为燃烧剂、聚乙二醇为分散剂,采用柠檬酸凝胶燃烧法制备Er,Yb:(YGd)_2O_3纳米粉体,最佳工艺条件为:Gd^(3+)的掺杂量为30%(摩尔分数,下同),Er^(3+)的掺杂量为4%,溶液的pH为8,纳米粉体平均粒径约为65nm。样品的激发和发射光谱中,在379 nm处样品的激发峰最强,Er^(3+)的~4I_(15/2)→~4G_(11/2);在562 nm处的发射峰最强,Er^(3+)对应的跃迁为~4S_(3/2)/~2H_(11/2)→~4I_(15/2)。在562nm处出现的绿光对应Er^(3+)的~4S_(3/2)/~2H_(11/2)→~4I_(15/2)跃迁,在658nm处出现的红光对应Er^(3+)的~4F_(9/2)→~4I_(15/2)跃迁,并对其发光跃迁机制进行了讨论。Er, Yb：（YGd）2O3 nano-powders were prepared by a citric acid gel combustion method with citric acid as a combustion agent and PEG as a dispersant. The powders can be obtained under the optimum conditions （i.e., the doping mole fraction of Gd^3＋ of 30% （in mole fraction） and the doping mole fraction of Er^3＋ of 4%, and pH value of 8）. According to the analysis by scanning electron microscopy, the average particle size of the nano-powders is approximately 65 nm. The most intense excitation and emission peaks are centered at 379 and 562 nm, which are corresponding to the 4I15/2→4G11/2 and 4S3/2/2H11/2→4I15/2 level transitions of Er^3＋, respectively. The up-conversion spectra of the samples show that the emission peaks of green and red appear at 562 and 658 nm, which are corresponding to the 4S3/2/2H11/2→4I15/2 and 4F9/2→4I15/2 level transition of Er^3＋, respectively. In addition, the luminescent mechanism of transition was also discussed.

关 键 词：铒镱掺杂氧化钇钆 柠檬酸凝胶燃烧法 激发光谱 上转换荧光光谱 

分 类 号：TQ133.3[化学工程—无机化工]