Influence of Zn Ions Codoping on Luminescence Properties of PbWO4:RE(RE=La, Yb, Y) |
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| Authors: | XU Yan-Ling WANG Rui WANG Bin-Ju LIU Wei-Hai WANG Jia WANG Miao YANG Tong-Yong |
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| Institution: | Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Institute of Physical Chemistry, Xiamen University, Xiamen 361005 |
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| Abstract: | Zn and RE (RE=La, Yb, Y) ions co-doped PbWO4 (PWO) single crystal grown by the Czochralski technique are characterized by x-ray diffraction (XRD), opticaltransmission spectra, and photoluminescence (PL). The doping of Zn ions shows distinct effects on the properties of PWO:RE crystals. At low concentration of Zn ions (200ppm), the luminescence intensity is quite weak for (Zn,La)-doped PWO, but is substantially strong for (Zn,Yb)-doped PWO. The blue luminescence intensity is significantly enhanced with the increasing Zn ions doping for PWO:Y. The trivalent ions codoping can increase the ratio of the blue luminescence contributing to the fast components of light yield. Ybions can enhance efficiency of luminescence in PWO:Yb:Zn because they may act as a luminous sensitization agent which can be involved in the efficient energy transfer and storage of the radiative process. |
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| Keywords: | 76 30 Kg 61 72 Ji 61 72 Ww |
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