稀土双掺Y_2O_2S双波长响应上转换发光材料制备及性能研究

Preparation and Properties of Double-Wavelength Sensitive Rare Earth Co-doped Y_2O_2S

采用高温固相反应法制备出针对980,1550 nm均响应的Y2O2S:Er3+,Yb3+红外上转换发光材料。通过正交实验研究了稀土掺杂浓度、灼烧温度、灼烧时间、助熔剂用量等对产物发光性能影响的主次关系,并确定出最佳配比和制备工艺参数。采用X射线粉末衍射仪、荧光分光光度计等手段对样品的物相及发光性能进行了测试与表征。综合考虑样品的双波长响应效果,确定样品的最佳配方为A4B3C1D3E2(即Er3+浓度10%,Yb3+浓度7.5%,1100℃,5 h,助熔剂用量为质量比m(Y2O3)∶m(S)∶m(Na2CO3)=10∶3∶2)。样品为六方晶系Y2O2S结构,Er3+,Yb3+的引入未改变晶体结构。在980和1550 nm激发下,样品发出源于Er3+的2H11/2→4I15/2,4S3/2→4I15/2跃迁的绿光(520～570nm)和4F9/2→4I15/2跃迁的红光(650～680 nm)。

The high-temperature solid-state reaction method was adopted to prepare the Y202S ： Er3 ＋ , Yb3 ＋ infrared upconversion material which is qsensitive to 980 and 1550 nm simultaneously. The effect of the doping concentration, calcining temperature, calcining duration and fluxing agent amount on the luminescence properties was studied in system through the orthogonal experiments, and the optimum conditions were ob- tained. X-ray diffractometer and fluorescence spec- trometer were used to test the phase and luminescence properties, respectively. The results showed that the optimum formulation was A4B3CID3E：, the sample was of the hexagonal phase of Y202S, and the sample will emit the green light （520 -570 nm） correspond-ing to the 2H11/2→ 4I15/2 and $3/2→4 Il5/2 transitions of Er3＋ and the red light （650 -680 nm） corresponding to the 4F9/2→4I15/2 transitions of Er3＋.