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Original Paper
Lead-vacancy-related hole centers in lead tungstate crystals
Article first published online: 14 AUG 2012
DOI: 10.1002/pssb.201248214
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Laguta, V., Nikl, M. and Zazubovich, S. (2012), Lead-vacancy-related hole centers in lead tungstate crystals. Phys. Status Solidi B, 249: 2161–2166. doi: 10.1002/pssb.201248214
Publication History
- Issue published online: 7 NOV 2012
- Article first published online: 14 AUG 2012
- Manuscript Accepted: 17 JUL 2012
- Manuscript Revised: 10 JUN 2012
- Manuscript Received: 14 MAY 2012
- Abstract
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Keywords:
- hole centers;
- lead tungstate;
- thermally stimulated luminescence
Abstract
After UV irradiation of PbWO4 crystals at T > 140 K in the energy range around 4.05 eV, besides the thermally stimulated luminescence (TSL) peak at ≈193 K arising from electron {Pb+ − VO} centers, a TSL peak at about 225 K appears. We suggest that this ≈225 K TSL peak arises from the thermal destruction of non-paramagnetic hole centers of the {VPb + 2h}-type (two holes trapped at the oxygen ions in the vicinity of a single lead vacancy VPb). The recombination of thermally or optically released electrons with these hole centers at T > 140 K is accompanied with green G(II) emission peaking at about 2.5 eV. The processes of photo-thermally stimulated creation of VPb-related hole centers have been studied.