Effect of Yb^(3+) concentration on the structures and upconversion luminescence properties of Y_2O_3:Er^(3+) ultrafine phosphors
Effect of Yb^(3+) concentration on the structures and upconversion luminescence properties of Y_2O_3:Er^(3+) ultrafine phosphors作者机构:School of Materiasls Science and Engineering Shenyang Institute of Chemical Technology Shenyang 110142 China Key Laboratory of Rare Earth Chemistry and Physics Chinese Academy of Sciences Changchun 130022 China
出 版 物:《Rare Metals》 (稀有金属(英文版))
年 卷 期:2008年第27卷第6期
页 面:603-607页
核心收录:
学科分类:08[工学] 0805[工学-材料科学与工程(可授工学、理学学位)] 080502[工学-材料学]
基 金:financially supported by the Foundation for Universities by the Educational Department of Liaoning Province China (No. 05L337)
主 题:ultrafine phosphor ion concentration urea homogeneous precipitation method upconversion luminescence
摘 要:Y2O3:Er^3+ ultrafine phosphors with a varying Yb^3+ ion concentration were prepared by a urea homogeneous precipitation method. The results of XRD show that all the samples are of a pure cubic structure and the average crystallite sizes can be calculated as 45, 34, and 28 nm for Y2O3:Er^3+ ultrafine phosphors with Yb^3+ ion concentrations of 0, 10%, and 20%, respectively. The lattice constant and cell volume of the ultrafine phosphors decrease with enhancing Yb^3+ ion concentration. The upconversion luminescence spectra of all the samples were studied under 980 nm laser excitation. The strong green and red upconversion emission were observed, and attributed to the ^2H11/2→^4I15/2, ^4S3/2 → ^4I15/2 and ^4F9/2 →^4I15/2 transitions of Er^3+, respectively. The intensity of red emission increases with increasing Yb^3+ ion concentration. The effect of Yb^3+ ion concentration on the structures and upconversion luminescence mechanism were discussed.