Effect of Yb3+ concentration on the structures and upconversion luminescence properties of Y2O3:Er3+ ultrafine phosphors
来源期刊：Rare Metals2008年第6期
论文作者：ZHANG Yongminga, LI Yanhonga, ZHANG Yanga, HONG Guangyanb, and YU Yingningb a School of Materiasls Science and Engineering, Shenyang Institute of Chemical Technology, Shenyang , China bKey Laboratory of Rare Earth Chemistry and Physics, Chinese Academy of Sciences, Changchun , China
文章页码：603 - 607
摘 要：Y2O3:Er3+ ultrafine phosphors with a varying Yb3+ 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:Er3+ ultrafine phosphors with Yb3+ ion concentrations of 0, 10%, and 20%, respec- tively. The lattice constant and cell volume of the ultrafine phosphors decrease with enhancing Yb3+ 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 Er3+, respectively. The intensity of red emission increases with increasing Yb3+ ion concentration. The effect of Yb3+ ion concentra- tion on the structures and upconversion luminescence mechanism were discussed.
ZHANG Yongminga, LI Yanhonga, ZHANG Yanga, HONG Guangyanb, and YU Yingningb a School of Materiasls Science and Engineering, Shenyang Institute of Chemical Technology, Shenyang 110142, China bKey Laboratory of Rare Earth Chemistry and Physics, Chinese Academy of Sciences, Changchun 130022, China
摘 要：Y2O3:Er3+ ultrafine phosphors with a varying Yb3+ 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:Er3+ ultrafine phosphors with Yb3+ ion concentrations of 0, 10%, and 20%, respec- tively. The lattice constant and cell volume of the ultrafine phosphors decrease with enhancing Yb3+ 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 Er3+, respectively. The intensity of red emission increases with increasing Yb3+ ion concentration. The effect of Yb3+ ion concentra- tion on the structures and upconversion luminescence mechanism were discussed.
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