Abstract：Sodium and aluminum fluorides coated BaF2 was synthesized by hydrothermal method. It was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and fluorescence spectrophotometer, respectively. The analysis results indicated that sodium and aluminum fluorides existed in the form of sodium fluoride and sodium fluoroaluminate, which combined with BaF2 surface via chemical bonds, and exhibited coated structure. Fluorescence spectroscopy testing showed that there were two wide upconversion emission peaks with maxima at 304 and 324 nm under the excitation at 583 and 863 nm, respectively. Its phosphorescence life time was greater than 18.4 ms, and the emission intensity exhibited a rising process from the beginning and a decaying process after 15 ms. The luminescence mechanism was proposed according to the energy conversion process of the upconversion emission, the results showed that the upconversion emission belonged to the quantum confinement effect-interface light emission center radiative recombination.
Key words：Barium fluoride;Coated structure;Upconversion luminescence materials;Phosphorescence life time;Luminescence properties
刘恩周1，樊 君1*，胡晓云2，叶岩溪2，侯文倩1 . 钠铝氟化物包覆BaF2材料上转换发光性能[J]. 光谱学与光谱分析, 2012, 32(01): 61-64.
LIU En-zhou1, FAN Jun1*, HU Xiao-yun2, YE Yan-xi2, HOU Wen-qian1 . Upconversion Properties of Sodium and Aluminum Fluorides Coated BaF2 Material . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(01): 61-64.
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