摘要
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.
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.
