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XPS STUDY OF DOPING MECHANISM IN HEAVILY DOPEDPbWO4:M3+(M=La,Nd,Gd)CRYSTALS

Author

Listed:
  • XIQI FENG

    (The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China)

  • WEIFENG LI

    (The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China)

  • WENLIANG ZHU

    (The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China)

Abstract

Lead tungstate (PbWO4) (PWO) crystals doped with high concentration trivalent rare earth ions have demonstrated to be a promising Cherenkov radiator material and also a potential material for optoelectronic application. In this paper, the doping mechanisms of the trivalent ions (La3+,Nd3+, andGd3+) in the PWO host were studied using X-ray photoelectron spectroscopy (XPS), and the results were consistent with those of computer simulation. It was found that when heavily doped,La3+may substitute for theWsites as well as thePbsites for self-compensation by formingLadimers or small aggregates. However, the doping mechanism of heavily doped PWO:Nd3+and PWO:Gd3+might be different from that of heavily doped PWO:La3+crystals.

Suggested Citation

  • Xiqi Feng & Weifeng Li & Wenliang Zhu, 2007. "XPS STUDY OF DOPING MECHANISM IN HEAVILY DOPEDPbWO4:M3+(M=La,Nd,Gd)CRYSTALS," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 14(04), pages 725-728.
    • Handle: RePEc:wsi:srlxxx:v:14:y:2007:i:04:n:s0218625x07010007
    DOI: 10.1142/S0218625X07010007
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    Keywords

    PbWO4crystal; doping mechanism; XPS;
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