钬镱双掺氧化镧镥粉体的合成及其光谱分析

Fabrication and Spectral Analysis of Ho^(3+),Yb^(3+) Co-doped (La Lu)_2O_3Powders

采用柠檬酸燃烧法制备了Ho,Yb∶(La Lu)_2O_3纳米粉体,确定了其制备的适宜条件。制得的粉体分散性较好,粒径均匀,平均粒径约为55 nm。研究了掺杂不同摩尔分数Ho^(3+)和Yb^(3+)对粉体荧光光谱的影响,980nm泵浦源激发下得到的粉体的上转换光谱显示,粉体发出484 nm蓝光(~5F_3→~5I_8)、551 nm绿光(~5S_2/~5F_4→~5I_8)、660 nm红光(~5F_5→~5I_8)。并讨论了掺杂离子Ho^(3+)-Yb^(3+)的上转换发光机制。

The powders of Ho,Yb∶(LaLu)2O 3 were prepared by citric acid combustion method.The preparation conditions of the powders were determined.The as-prepared particles are of near-spherical shape,and weak agglomeration,the average particle size was about 55 nm.The effects of different mole fraction Ho 3+and Yb 3+on the fluorescence spectra of the powders were studied.Under the excitation of 980 nm,the powders can emit blue-ray appeared at 484 nm,corresponding to the energy level transition of Ho 3+from 5F 3 to 5I 8,green light appeared at 551 nm,corresponding to the energy level transition of Ho 3+from 5S 2/5F 4 to 5I 8,and red light at 660 nm,corresponding to the energy level transition of Ho 3+from 5F 5 to 5I 8.The upconversion luminescence mechanism of Ho 3+-Yb 3+in co-doped system was discussed.