Chinese Journal of Applied Chemistry

• Full Papers • Previous Articles     Next Articles

Thermoluminescence of Rare Earth Ion Dy3+/Tm3+ Doped Zinc Tetraborate Phosphors

LIU Liyan1*, SUN Yidan1, YU Zhan1, TIAN Peng1, ZHANG Xiangdong2, JIANG Lihong3, LI Chengyu3   

  1. (1.School of Chemical and Life Sciences,Shenyang Normal University,Shenyang  110034,China;
    2.School of Chemistry and Chemical Engineering,Liaoning University,Shenyang 110036,China;
    3.Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China)
  • Received:2013-09-12 Revised:2013-12-12 Published:2014-07-10 Online:2014-07-10

Abstract: Dy3+ or Tm3+-doped zinc tetraborate(ZnB4O7) phosphors were prepared by the method of high temperature solid-state synthesis. The 3-dimensional thermoluminescent(TL) spectra of the phosphors after 60Coγ-ray radiation were measured at room temperature. The 3-dimensional TL spectra show that the main TL glow peaks of these phosphors appear at about 218 ℃. 3-Dimensional emission spectra of main TL peaks for the ZnB4O7∶Tm3+ phosphor are at 366, 453, 475, 651 and 754 nm, while TL peaks for the ZnB4O7∶Dy3+ phosphor are at 480, 573, 665 and 755 nm, respectively. The formation of all peaks is ascribed to the characteristic rare earth ion transitions of Tm3+ and Dy3+. The ZnB4O7∶Tm3+ phosphor exhibits a higher TL emission efficiency, indicating its latent applicability in the field of radiation dosimetry compared with the ZnB4O7∶Dy3+ phosphor. The kinetics parameters of the main TL peak of the ZnB4O7∶Tm3+ phosphor at 218 ℃ were investigated by using the peak shape method. This peak shows the second-order kinetics while the trap depth(E) and the frequency factor are evaluated as 1.64 eV and 3.42×1016 s-1, respectively.

Key words: solid-state reaction, zinc tetraborate, rare earth, thermoluminescence

CLC Number: