中文摘要：

以Y2O2S为基质材料、Er2O3为激活剂、Yb2O3为敏化剂,采用固相反应法制备Y2O2S：Er^3＋,Yb^3＋上转换发光材料。采用X射线粉末衍射分析和荧光光谱分析表征样品的结构和发光性能,并分析上转换发光机理。结果表明：在980 nm和1 550 nm红外光激发下,样品发出源于Er3＋的2H11/2→4I15/2、4S3/2→4I15/2（520～570 nm）较强的绿色发光和4F9/2→4I15/2（650～680 nm）的较弱的红色发光。

英文摘要：

Up-conversion luminescence material Y2O2S：Er,Yb was prepared by the solid-state reaction method,with Y2O2S as matrix,Er2O3 as activator and Yb2O3 as sensitizer.The X-ray diffraction pattern and luminescence spectra were measured to characterize structure and luminescence properties of samples,and the mechanism of the up-conversion luminescence was interpreted.Results show that strong green（520-570 nm） and weaker red（650-680 nm） emissions,which originated from radiative transitions of 2H11/2→ 4I15/2,4S3/2→4I15/2 and 4F9/2→4I15/2 energy levels of Er3＋ are observed under the excitation of 980 nm and 1 550 nm infrared light.