Y2O3：Yb，Er纳米材料的制备及上转换发光研究

Synthesis and Luminescence Study of Infrared-to-visible Upconversion Nano-powders Y2O3 ：Yb, Er

利用柠檬酸络合溶胶-凝胶（Sol—gel）法制备Y2o3：Yb，Er纳米上转换材料．通过改变掺杂元素Yb，Er的比例和焙烧温度，在980nm的红外光激发下，观察研究氧化物颗粒的发光性质．通过研究可知，该粉体在980nm半导体激光器激发下发出绿色和红色的上转换荧光，分别对应于Er^3＋离子2^H11／2→4^I15／2，4^S3／2→4^I15／2和4^F9／2→4^I15／2的跃迁．

Infrared-to-Visible Upconversion Nano-powders Y2O3 ：Yb, Er were synthesized by citric acid chelated sol-gel method. According to the research, we find that： red and green upconversion luminescence was obtained under 980nm infrared excitation. Effect of differert temperature and proportion in [Yb^3＋] and [Er^3＋] on the intensity of upconversion emission was also investigated.