Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (10): 2427-2431.doi: 10.3866/PKU.WHXB20110928

• PHOTOCHEMISTRY AND RADIATION CHEMISTRY • Previous Articles     Next Articles

Near-Infrared Luminescence Enhancement by Co-Doped Bi3+ in YVO4:Yb3+

XIAO Quan-Lan1, MENG Jian-Xin1,2, XIE Li-Juan1, ZHANG Rui1   

  1. 1. Department of Chemistry, Jinan University, Guangzhou 510632, P. R. China;
    2. Intitute of Nanochemistry, Jinan Univesity, Guangzhou 510632, P. R. China
  • Received:2011-06-15 Revised:2011-07-04 Published:2011-09-27
  • Contact: MENG Jian-Xin
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (30670523) and Central University by Basic Scientific Research Business Expenses, China.

Abstract: The near-infrared (NIR) luminescence phosphor Yb3+,Bi3+ co-doped YVO4 was prepared by a conventional solid state method and the sensitization of Yb3+ near-infrared luminescence by Bi3+ was investigated. By co-doping with Bi3+ from 0 to 0.05 the characteristic NIR luminescence of Yb3+ in the YVO4 matrix was greatly enhanced and the strongest site of the excitation wavelength red-shifted from 335 to 352 nm while the wavelength range of the excitation spectrum broadened from 300-360 to 300-430 nm. The optimized Bi3+ content is 0.03. The possible energy transfer mechanism among VO43-, Bi3+ , and Yb3+ was discussed. We conclude that the NIR luminescence of YVO4:Yb3+ can be remarkably improved by co-doping with Bi3+ and its absorbance matches better with the solar energy spectrum. YVO4:Yb3+, Bi3+ is a promising spectral converter for silicon solar cells and it is expected to improve the photoelectric conversion efficiency.

Key words: Near-infrared luminescence, Solid state reaction, Energy down-conversion, YVO4:Yb3+,Bi3+


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