Green, orange, and red upconversion luminescence in Nd3+/Yb3+: Cs2NaGdCl6 powders under 785 nm laser excitation
来源期刊：Journal of Rare Earths2008年第6期
论文作者：王殿元 郭艳艳 吴杏华 张玉霞
文章页码：880 - 882
摘 要：<正>Nd3+:Cs2NaGdCl6 and Nd3+, Yb3+:Cs2NaGdCl6 polycrystalline powder samples were prepared by Morss method E. Under 785 nm semiconductor laser pumping, the upconversion luminescence of Nd3+ ions in Cs2NaGdCl6 was investigated at room temperature, and three upconversion emissions near 538 nm （Green）, 603 nm （Orange）, and 675 nm （Red） were observed and assigned to 4G7/2→4I9/2, （4G7/2→4I11/2; 4G5/2→4I9/2）, and （4G7/2→4I13/2; 4G5/2→4I11/2）, respectively. The dependences of these upconverted emissions on laser power and Nd3+ ion concentration were investigated, to explore the upconversion mechanism. The effect of doping Yb3+ ions on the upconversion luminescence of Nd3+ in Cs2NaGdCl6 was also studied under 785 nm laser excitation. The energy transfer processes were discussed as the possible mecha-nism for the above upconversion emissions.
王殿元1，郭艳艳2，吴杏华1，张玉霞1
1. College of Science, Jiujiang University2. College of Mechanical and Materials Engineering, Jiujiang University
摘 要：<正>Nd3+:Cs2NaGdCl6 and Nd3+, Yb3+:Cs2NaGdCl6 polycrystalline powder samples were prepared by Morss method E. Under 785 nm semiconductor laser pumping, the upconversion luminescence of Nd3+ ions in Cs2NaGdCl6 was investigated at room temperature, and three upconversion emissions near 538 nm （Green）, 603 nm （Orange）, and 675 nm （Red） were observed and assigned to 4G7/2→4I9/2, （4G7/2→4I11/2; 4G5/2→4I9/2）, and （4G7/2→4I13/2; 4G5/2→4I11/2）, respectively. The dependences of these upconverted emissions on laser power and Nd3+ ion concentration were investigated, to explore the upconversion mechanism. The effect of doping Yb3+ ions on the upconversion luminescence of Nd3+ in Cs2NaGdCl6 was also studied under 785 nm laser excitation. The energy transfer processes were discussed as the possible mecha-nism for the above upconversion emissions.
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