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Luminescence of Ce3+- and Eu2+- doped silica glasses under UV and X-ray excitation

W. CHEWPRADITKUL1,* , Y. SHEN2, D. CHEN2, M. NIKL3, A. BEITLEROVA3

Affiliation

  1. Department of Physics, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand
  2. Shanghai Institute of Optics and Fine Mechanics, CAS, Shanghai 201800, PR China
  3. Institute of Physics, AS CR, Cukrovarnicka 10, Prague 16253 , Czech Republic

Abstract

Ce3+- and Eu2+ - doped silica glasses were prepared by impregnation of Ce and Eu ions, respectively, into porous silica glasses followed by high temperature sintering in a CO reducing atmosphere. The characteristic emission band of Ce3+ 5d → 4f transition peaking around 375 nm is observed in the luminescence spectra of Ce3+- doped glass under UV and X-ray excitation. Its photoluminescence decay is governed by several tens of nanoseconds decay time. For Eu2+- doped glass, the Eu2+ 5d → 4f emission band peaking around 430 nm is observed in the luminescence spectra and its photoluminescence decay is governed by a few microseconds decay time. The X-ray excited integral scintillation efficiency of about 82% and 120% of that of the Bi4Ge3O12(BGO) crystal is obtained, respectively, for the Ce3+- and Eu2+- doped glasses. Scintillation light yield under gamma-ray excitation was also measured and compared with that of the BGO and CeF3 crystals..

Keywords

Ce3+, Eu2+ , Luminescence, Photoluminescence decay, Porous materials, Scintillation.

Submitted at: Feb. 7, 2013
Accepted at: Feb. 20, 2013

Citation

W. CHEWPRADITKUL, Y. SHEN, D. CHEN, M. NIKL, A. BEITLEROVA, Luminescence of Ce3+- and Eu2+- doped silica glasses under UV and X-ray excitation, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 1-2, pp. 94-98 (2013)