Up-Conversion Luminescent Materials of Y2O3∶RE(RE=Er or Er/Yb) Prepared by Sol-Gel Combustion Synthesis
HAN Peng-de1, ZHANG Le1, HUANG Xiao-gu1, WANG Li-xi1, ZHANG Qi-tu1, 2*
1. College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China 2. Jiangsu Provincial Key Laboratory of New Inorganic Materals and Composites, Nanjing University of Technology, Nanjing 210009, China
Abstract：Y2O3 powders doped with rare-earth ions were synthesized by sol-gel combustion synthesis. Effects of different calcinating temperatures, Er3+ doping concentration and Yb3+ doping concentration were investigated. It was shown that the single well crystallized Y2O3 powders could be obtained at 800 ℃; as the calcinating temperature increased, the crystallinity and upconversion luminescence intensity were higher; the particle size was uniform around 1 μm at 900 ℃; when Er3+ doping concentration was 1 mol%, the green upconversion luminescence intensity reached the maximum, but for red upconversion luminescence, when Er3+ doping concentration was 4 mol%, its luminescence intensity reached the maximum; as the ratio of Yb3+ to Er3+ was 4∶1, the green emission intensity reached the maximum, while the red emission intensity was always increasing as Yb3+ doping concentration increased.
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