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Title: Temporal and temperature evolution of electric field in CdTe:In radiation detectors

We employed measurement of the Pockels electro-optic effect to study the electric field and space charge dynamics in semi-insulating CdTe doped with indium. We performed measurements of time and temperature dependence of the electric field. The polarization due to space charge build-up decreases with increasing temperature. Increase of temperature, therefore, leads to de-polarization in CdTe:In detectors which are opposite to the CdTe:Cl samples studied to date. We have shown that the thermally activated depolarization cannot be explained by the conventional model used for the description of space charge formation so far and an alternative model involving a recombination level was suggested and successfully used.
Authors:
; ; ; ;  [1] ;  [2]
  1. Faculty of Mathematics and Physics, Institute of Physics, Charles University, KeKarlovu 5, Prague 2 CZ-121 16 (Czech Republic)
  2. Department of Physics, University of Surrey, Guildford GU2 7XH (United Kingdom)
Publication Date:
OSTI Identifier:
22314548
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CADMIUM TELLURIDES; DEPOLARIZATION; DOPED MATERIALS; ELECTRIC FIELDS; POLARIZATION; RADIATION DETECTORS; RECOMBINATION; SPACE CHARGE; TEMPERATURE DEPENDENCE