Er,Yb:(LaGd)_2O_3纳米粉体的制备与发光性质  

Preparation and Luminescence Property of Er,Yb:(LaGd)_2O_3 Nano-Powder

作　　者：艾赛 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》2015年第11期1625-1630,共6页Journal of The Chinese Ceramic Society

基　　金：吉林省科技发展计划项目(20120223)

摘　　要：以碳酸氢铵为沉淀剂,采用共沉淀法制备了Er,Yb:(La Gd)2O3纳米粉体。经1 000℃煅烧2 h得到的粉体颗粒呈规则球形,平均粒径约为90 nm,团聚低,分布均匀。研究了Er3+,Yb3+的掺杂量对样品发光强度的影响。结果表明:掺杂Er3+和Yb3+的摩尔分数分别为4%和5%时,所得样品的发光性能最优。样品的激发和发射光谱显示:在379 nm处激发峰最强,对应Er3+的4I15/2→4G11/2能级跃迁;最强发射峰位于562 nm处,对应于4S3/2/2H11/2→4I15/2能级跃迁。样品的上转换光谱表明:样品在548和662 nm有较强的发射峰,对应Er3+的4S3/2/2H11/2→4I15/2跃迁和4F9/2→4I15/2跃迁。并讨论了发光跃迁机制。A Nano-powder of Er,Yb：（La Gd）2O3 was prepared via coprecipitation with ammonium bicarbonate as a precipitant agent. The powder was obtained under the optimum preparation conditions（i.e., calcination temperature of 1 000 ℃ and calcination time of 2 h）. According to the analysis by scanning electron microscopy, the average particle size of the powder prepared is 90 nm. The excitation and emission spectra of Er,Yb：（La Gd）2O3 sample at room temperature were determined. 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 Er3＋, respectively. The upconversion fluorescence spectrum of the sample was examined. The results show that two intense emission bands are located at 548 and 662 nm, which are corresponding to the 4S3/2/2H11/2→4I15/2 and 4F9/2/→4I15/2 level transition of Er3＋, respectively. The influence of the doping concentration of Er3＋,Yb3＋ on the luminescence property of the sample was analyzed. In addition, the light transition mechanism was also discussed.

关 键 词：铒镱掺杂氧化镧钆 纳米粉体 共沉淀法 上转换发光 

分 类 号：TQ133.3[化学工程—无机化工]