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Title: Study on thermal annealing of cadmium zinc telluride (CZT) crystals

Abstract

Cadmium Zinc Telluride (CZT) has attracted increasing interest with its promising potential as a room-temperature nuclear-radiation-detector material. However, different defects in CZT crystals, especially Te inclusions and dislocations, can degrade the performance of CZT detectors. Post-growth annealing is a good approach potentially to eliminate the deleterious influence of these defects. At Brookhaven National Laboratory (BNL), we built up different facilities for investigating post-growth annealing of CZT. Here, we report our latest experimental results. Cd-vapor annealing reduces the density of Te inclusions, while large temperature gradient promotes the migration of small-size Te inclusions. Simultaneously, the annealing lowers the density of dislocations. However, only-Cd-vapor annealing decreases the resistivity, possibly reflecting the introduction of extra Cd in the lattice. Subsequent Te-vapor annealing is needed to ensure the recovery of the resistivity after removing the Te inclusions.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
DOE/Office Of Nonproliferation & National Security
OSTI Identifier:
1013507
Report Number(s):
BNL-93957-2010-CP
R&D Project: 10407; 10407; NN2001000; TRN: US1102496
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Conference
Resource Relation:
Conference: 2010 SPIE Optics + Photonics; San Diego, California; 20100801 through 20100805
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNEALING; BNL; CADMIUM; DEFECTS; DISLOCATIONS; OPTICS; PERFORMANCE; TEMPERATURE GRADIENTS; ZINC TELLURIDES; radiation detection; CZT; annealing; Te inclusions; dislocations

Citation Formats

Yang, G, Bolotnikov, A E, Fochuk, P M, Camarda, G S, Cui, Y, Hossain, A, Kim, K, Horace, J, McCall, B, Gul, R, Xu, L, Kopach, O V, and and James, R B. Study on thermal annealing of cadmium zinc telluride (CZT) crystals. United States: N. p., 2010. Web.
Yang, G, Bolotnikov, A E, Fochuk, P M, Camarda, G S, Cui, Y, Hossain, A, Kim, K, Horace, J, McCall, B, Gul, R, Xu, L, Kopach, O V, & and James, R B. Study on thermal annealing of cadmium zinc telluride (CZT) crystals. United States.
Yang, G, Bolotnikov, A E, Fochuk, P M, Camarda, G S, Cui, Y, Hossain, A, Kim, K, Horace, J, McCall, B, Gul, R, Xu, L, Kopach, O V, and and James, R B. Sun . "Study on thermal annealing of cadmium zinc telluride (CZT) crystals". United States. https://www.osti.gov/servlets/purl/1013507.
@article{osti_1013507,
title = {Study on thermal annealing of cadmium zinc telluride (CZT) crystals},
author = {Yang, G and Bolotnikov, A E and Fochuk, P M and Camarda, G S and Cui, Y and Hossain, A and Kim, K and Horace, J and McCall, B and Gul, R and Xu, L and Kopach, O V and and James, R B},
abstractNote = {Cadmium Zinc Telluride (CZT) has attracted increasing interest with its promising potential as a room-temperature nuclear-radiation-detector material. However, different defects in CZT crystals, especially Te inclusions and dislocations, can degrade the performance of CZT detectors. Post-growth annealing is a good approach potentially to eliminate the deleterious influence of these defects. At Brookhaven National Laboratory (BNL), we built up different facilities for investigating post-growth annealing of CZT. Here, we report our latest experimental results. Cd-vapor annealing reduces the density of Te inclusions, while large temperature gradient promotes the migration of small-size Te inclusions. Simultaneously, the annealing lowers the density of dislocations. However, only-Cd-vapor annealing decreases the resistivity, possibly reflecting the introduction of extra Cd in the lattice. Subsequent Te-vapor annealing is needed to ensure the recovery of the resistivity after removing the Te inclusions.},
doi = {},
url = {https://www.osti.gov/biblio/1013507}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {8}
}

Conference:
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