Upconversion Luminescence Property of Nanocrystalline Y₂O₃:Pr³⁺,Yb ³⁺

Abstract:

The upconversion luminescence nanocrystalline powders Y₂O ₃:Pr ³⁺ ,Yb ³⁺ were prepared by co-precipitation method and characterized by X－ray diffraction,fluorescence spectrum and so on. Its luminescence property and the effect of different calcining temperatures and rare-earth ion doped concentration on its luminescence property were discussed. The results show that the nanocrystalline powders calcined at 800-1200 °C for 2h has a single crystalline phase -the solid solution cubic system phase of Y₂O ₃. There is a upconversion luminescence phenomenon in the powders doped 1%(mol percent) Pr ³⁺ . The powders excited by a 980 nm laser diode emit weak green fluorescent observed by naked eye. The upconversion luminescence of Pr ³⁺in Y₂O ₃:Pr ³⁺ ,Yb ³⁺ is obviously different that of Pr3+in other materials.There are two stronger emission zone in upconversion emission spectra of the powders in the 400nm-800nm range,whose center wavelength value are respectively 551nm, 762nm.Increasing the calcining temperature of the samples from 1000°C to 1200°C, the emission peak intensity sharply elevates.

• Periodical: Advanced Materials Research (Volumes 535-537)
• Pages: 1279-1282
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.535-537.1279
• Online since: June 2012
• Authors: Dan Hu, Yong Qiang Zhou, Ruo Nan Dai, De Shuai Chen, Guo Dong Cai, Wang Zi Li, Si Cen Li, Pei Lu Li
• Keywords: Co-Precipitation Method, Nanocrystalline, Upconversion Luminescence Property, Y₂O₃:Pr³⁺, Yb³⁺

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