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Influence of Zn Ions Codoping on Luminescence Properties of PbWO4:RE(RE=La, Yb, Y) |
| XU Yan-Ling1;WANG Rui1;WANG Bin-Ju1,2;LIU Wei-Hai1;WANG Jia1;WANG Miao1;YANG Tong-Yong1 |
| 1Department of Applied Chemistry, Harbin Institute of Technology, Harbin 1500012State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Institute of Physical Chemistry, Xiamen University, Xiamen 361005 |
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XU Yan-Ling, WANG Rui, WANG Bin-Ju et al 2008 Chin. Phys. Lett. 25 2246-2248 |
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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), optical
transmission 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. Yb
ions 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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76.30.Kg
61.72.Ji
61.72.Ww
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Received: 19 January 2008
Published: 31 May 2008
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