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Proceedings Paper

High-temperature treatment of In-doped CZT crystals grown by the high-pressure Bridgman method
Author(s): P. Fochuk; I. Nakonechnyi; O. Kopach; Ye. Verzhak; O. Panchuk; V. Komar; Igor Terzin; Vladimir Kutnij; A. Rybka; Yevhen Nykoniuk; A. E. Bolotnikov; G. C. Camarda; Y. Cui; A. Hossain; K. H. Kim; G. Yang; R. B. James
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Paper Abstract

We evaluated the effect of high-temperature treatment of Cd0.9Zn0.1Te:In single crystals using Hall-effect measurements, medium- and high-temperature annealing under various deviations from stoichiometry, and infra-red (IR) transmission microscopy Annealing at ~730 K sharply increased the electrical conductivity (by ~1-2 orders-of-magnitude). Plots of the temperature- and cadmium-pressure dependences of the electrical conductivity, carrier concentration, and mobility were obtained. Treating previously annealed Cd-samples under a Te overpressure at 1070 K allowed us to restore their resistance to its initial high values. The main difference in comparing this material with CdTe was its lowered electron density. We explained our results within the framework of Kröger’s theory of quasi-chemical reactions between point defects in solids.

Paper Details

Date Published: 24 October 2012
PDF: 9 pages
Proc. SPIE 8507, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIV, 85071L (24 October 2012); doi: 10.1117/12.929035
Show Author Affiliations
P. Fochuk, Chernivtsi National Univ. (Ukraine)
I. Nakonechnyi, Chernivtsi National Univ. (Ukraine)
O. Kopach, Chernivtsi National Univ. (Ukraine)
Ye. Verzhak, Chernivtsi National Univ. (Ukraine)
O. Panchuk, Chernivtsi National Univ. (Ukraine)
V. Komar, Institute of Single Crystals (Ukraine)
Igor Terzin, Institute of Single Crystals (Ukraine)
Vladimir Kutnij, National Science Ctr. Kharkov Institute of Physics and Technology (Ukraine)
A. Rybka, National Science Ctr. Kharkov Institute of Physics and Technology (Ukraine)
Yevhen Nykoniuk, National Univ. of Water Management and Nature Resources Use (Ukraine)
A. E. Bolotnikov, Brookhaven National Lab. (United States)
G. C. Camarda, Brookhaven National Lab. (United States)
Y. Cui, Brookhaven National Lab. (United States)
A. Hossain, Brookhaven National Lab. (United States)
K. H. Kim, Brookhaven National Lab. (United States)
G. Yang, Brookhaven National Lab. (United States)
R. B. James, Brookhaven National Lab. (United States)

Published in SPIE Proceedings Vol. 8507:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIV
Ralph B. James; Arnold Burger; Larry A. Franks; Michael Fiederle, Editor(s)

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