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柠檬酸凝胶燃烧法制备Tm,Yb:(LuGd)2O3纳米粉体及其发光性能
作者:刘颖 项贤晓 朱忠丽 
单位:长春理工大学化学与环境工程学院 长春 130022 
关键词:柠檬酸凝胶燃烧法 铥镱掺杂氧化镥粉体 激发和发射光谱 上转换荧光谱 
分类号:TQ 133.3
出版年,卷(期):页码:2016,44(7):964-968
DOI:
摘要:

以柠檬酸为燃烧剂,PEG(10000)为分散剂,采用柠檬酸凝胶燃烧法制备Tm,Yb:(LuGd)2O3纳米粉体,得出最佳的实验条件为:Lu3+的掺杂量为25%(摩尔分数),溶液pH值为6。制备的纳米粉体平均粒径约为55 nm。测试了样品的激发和发射光谱。结果显示:最强激发峰位于361 nm处,归属于Tm3+的3H6→1D2能级跃迁;最强发射峰出现在454 nm处,归属于Tm3+的1G4→3H6的能级跃迁。样品上转换光谱显示:样品在484和658 nm处分别产生蓝光和红光的发射峰,分别归属于Tm3+的1G4→3H6和1G4→3F4能级跃迁。研究了不同Tm3+掺杂量对上转换发光强度的影响,确定了Tm3+的掺杂量为4%,并讨论了发光跃迁机制。
 

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Tm,Yb:(LuGd)2O3 nano-powder was prepared by a gel combustion method with citric acid as an incendiary agent and polyethylene glycol as a dispersing agent. The sample was obtained under the optimal preparation condition (i.e., Lu3+-doped mole fractions of 25% and pH value of 6). The average particle size of nanopowder prepared is approximately 55 nm. The features of excitation and emission spectra of Tm,Yb:(LuGd)2O3 powder at room temperature were investigated. The results show that the most intense excitation and emission peaks are located at 361 nm and 454 nm, which are corresponding to the 3H6→1D2 and 1G4→3H6 level transitions of Tm3+, respectively. The upconversion fluorescence spectrum of sample indicates that the blue and red lights fluorescence peaks of the sample are located at 484 nm and 658 nm, which are corresponding to the 1G4→3H6 and 1G4→3F4 level transitions of Tm3+, respectively. The effect of mole fraction of Tm3+-doped on the upconversion luminescence intensity was investigated. The optimum amount of Tm3+-doped is 4%. In addition, the light transition mechanism was also discussed.
 

基金项目:
吉林省科技发展计划项目(20120223)
作者简介:
刘 颖(1991—),女,硕士研究生。
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