Li^+/Er^3+:Y2O3上转换发光增强机制研究  

Enhancement of Upconversion Emission in Li+/Er3+:Y2O3

作　　者：杨明珠 吕树臣[2] 姜洪喜 李社 田雪松 魏英智 Yang Mingzhu;Lv Shuchen;Jiang Hongxi;Li She;Tian Xuesong;Wei Yingzhi(Heilongjiang University of Sciencje and Technology;Harbin Normal University)

机构地区：[1]黑龙江科技大学 [2]哈尔滨师范大学

出　　处：《哈尔滨师范大学自然科学学报》2020年第1期32-36,共5页Natural Science Journal of Harbin Normal University

基　　金：黑龙江省自然科学基金(QC2017062)。

摘　　要：采用溶胶凝胶法合成了Li^+/Er^3+∶Y2O3粉体.随着Li+掺杂浓度的增加,Li^+/Er^3+∶Y2O3粉体的上转换发光明显增强.实验结果表明:小半径、低价态的Li+掺杂可以降低Er3+周围局部晶体场对称性,提高Er^3+的辐射跃迁几率、影响Er^3+的能级寿命.同时,Li^+掺杂能够增大晶粒尺寸,减少表面高能悬键,降低无辐射跃几率.因此,掺杂Li^+后Er^3+发光强度明显提高.Li^+/Er^3+∶Y2O3 powder was synthesized by sol-gel method.With the increase of Li^+doping concentration,the up-conversion luminescence of Li^+/Er^3+∶Y2O3 powders was significantly enhanced.The experimental results show that Li^+doping with small radius and low valence state can effectively reduce the symmetry of crystal field around Er^3+,improve the radiation transition probability of Er^3+,change the energy level life of Er^3+.Meanwhile,Li^+doping can increase the grain size,reduce the surface high energy hanging bond,and reduce non-radiation transition probability.Therefore,doping Li^+greatly,the luminescence intensity of Er^3+is increased.

关 键 词：Er3+∶Y2O3 Li^+掺杂 发光机制 

分 类 号：O433[机械工程—光学工程]