【摘要】 采用柠檬酸燃烧法制备了Ho,Yb∶（La Lu）₂O₃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Ho³⁺和Yb³⁺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（⁵F₃→⁵I₈）、551 nm绿光（⁵S₂/⁵F₄→⁵I₈）、660 nm红光（⁵F₅→⁵I₈）。并讨论了掺杂离子Ho³⁺-Yb³⁺的上转换发光机制。更多还原

【Abstract】 The powders of Ho,Yb∶（La Lu）₂O₃were 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 Ho³⁺and Yb³⁺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 Ho³⁺from⁵F₃to⁵I₈,green light appeared at 551 nm,corresponding to the energy level transition of Ho³⁺from⁵S₂/⁵F₄to⁵I₈,and red light at 660 nm,corresponding to the energy level transition of Ho³⁺from⁵F₅to⁵I₈.The upconversion luminescence mechanism of Ho³⁺-Yb³⁺in co-doped system was discussed.更多还原