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Influence of lithium co-dopant on the UV-stimulated thermoluminescence of Erbium-doped zirconium dioxide

H. HRISTOV1, N. ARHANGELOVA1, I. PENEV2, M. BELLO3, G. MOSCHINI3, N. UZUNOV1,3,*

Affiliation

  1. Shumen University Konstantin Preslavsky,115 Universitetska street, 9712 Shumen, Bulgaria
  2. Institute for Nuclear Research and Nuclear Energy, BAS, 72 Tzarigradsko chaussee Blv, 1784 Sofia
  3. National Laboratories of Legnaro, INFN, Viale dell’Universita 2, 35020 Legnaro, Italy

Abstract

Research for thermoluminescence (TL) phosphors possessing a good sensitivity for the ultraviolet light (UV) and relatively long fading has been conducted. Kinetic parameters of ZrO2 doped by Eu and Li have been studied as a potential phosphor sensible to the UV light. Quantities of lithium co-dopant were added as Li2CO3 to a mixture of ZrO2 doped with 1% Er2O3. Pellets sintered at a temperature of 12000 C were irradiated with UV light. The analysis applied to the thermoluminescence glow curves of these phosphors revealed that the addition of Li enhances the TL emission of peaks at 650 C and at 1050 C. The latter showed up good sensitivity to the UV emission, has a relatively long fading and could be a convenient peak for detection and measurements of UV light..

Keywords

Thermoluminescence, Glow curve, Kinetic order, Activation energy, Fading.

Submitted at: April 7, 2010
Accepted at: April 26, 2010

Citation

H. HRISTOV, N. ARHANGELOVA, I. PENEV, M. BELLO, G. MOSCHINI, N. UZUNOV, Influence of lithium co-dopant on the UV-stimulated thermoluminescence of Erbium-doped zirconium dioxide, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 4, pp. 892-894 (2010)