Green, orange, and red upconversion luminescence in Nd3+/Yb3+: Cs2NaGdCl6 powders under 785 nm laser excitation

稀土学报(英文版), 2008, 26(6): 880-882.

^1, , ^2, , ^3, , ^4,

1.College of Science, Jiujiang University, Jiujiang 332005, China

2.College of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China

3.College of Science, Jiujiang University, Jiujiang 332005, China

4.College of Science, Jiujiang University, Jiujiang 332005, China

基金项目: Scientific Project of Jiangxi Education Departments of China(2007330) 九江大学自然科学基金(05KJ01)

Green, orange, and red upconversion luminescence in Nd3+/Yb3+: Cs2NaGdCl6 powders under 785 nm laser excitation

WANG Dianyuan ^1, , GUO Yanyan ^2, , WU Xinghua ^3, , Zhang Yuxia ^4,

1.College of Science, Jiujiang University, Jiujiang 332005, China

2.College of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China

3.College of Science, Jiujiang University, Jiujiang 332005, China

4.College of Science, Jiujiang University, Jiujiang 332005, China

Keywords： upconversion luminescence

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 (Grange), 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 con-eentration 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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Green, orange, and red upconversion luminescence in Nd3+/Yb3+: Cs2NaGdCl6 powders under 785 nm laser excitation

参考文献