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Title: Purification of CdZnTe by Electromigration

Abstract

Electro-migration of ionized/electrically active impurities in CdZnTe (CZT) was successfully demonstrated at elevated temperature with an electric field of 20 V/mm. Copper, which exists in positively charged states, electro-migrated at a speed of 15 lm/h in an electric field of 20 V/mm. A notable variation in impurity concentration along the growth direction with the segregation tendency of the impurities was observed in an electro-migrated CZT boule. Notably, both Ga and Fe, which exist in positively charged states, exhibited the opposite distribution to that of their segregation tendency in Cd(Zn)Te. Furthermore, a CZT detector fabricated from the middle portion of the electromigrated CZT boule showed an improved mobility-lifetime product of 0.91 10-2 cm2 /V, compared to that of 1.4 10-3 cm2 /V, observed in an as-grown (non-electro-migrated) CZT detector. The optimum radiation detector material would have minimum concentration of deep traps required for compensation.

Authors:
 [1];  [2];  [3];  [3];  [4];  [2];  [4];  [4]
+ Show Author Affiliations
  1. Korea Univ., Seoul (South Korea)
  2. Korea Univ., Sejong (South Korea)
  3. AbyzR Corp., Gyeonggi (South Korea)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Nonproliferation and Verification Research and Development (NA-22); USDOE
OSTI Identifier:
1224178
Alternate Identifier(s):
OSTI ID: 1228597
Report Number(s):
BNL-108136-2015-JA
Journal ID: ISSN 0021-8979; NN2001; TRN: US1500783
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 14; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Kim, K., Kim, Sangsu, Hong, Jinki, Lee, Jinseo, Hong, Taekwon, Bolotnikov, A. E., Camarda, G. S., and James, R. B. Purification of CdZnTe by Electromigration. United States: N. p., 2015. Web. doi:10.1063/1.4917460.
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Kim, K., Kim, Sangsu, Hong, Jinki, Lee, Jinseo, Hong, Taekwon, Bolotnikov, A. E., Camarda, G. S., & James, R. B. Purification of CdZnTe by Electromigration. United States. https://doi.org/10.1063/1.4917460
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Kim, K., Kim, Sangsu, Hong, Jinki, Lee, Jinseo, Hong, Taekwon, Bolotnikov, A. E., Camarda, G. S., and James, R. B. Tue . "Purification of CdZnTe by Electromigration". United States. https://doi.org/10.1063/1.4917460. https://www.osti.gov/servlets/purl/1224178.
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@article{osti_1224178,
title = {Purification of CdZnTe by Electromigration},
author = {Kim, K. and Kim, Sangsu and Hong, Jinki and Lee, Jinseo and Hong, Taekwon and Bolotnikov, A. E. and Camarda, G. S. and James, R. B.},
abstractNote = {Electro-migration of ionized/electrically active impurities in CdZnTe (CZT) was successfully demonstrated at elevated temperature with an electric field of 20 V/mm. Copper, which exists in positively charged states, electro-migrated at a speed of 15 lm/h in an electric field of 20 V/mm. A notable variation in impurity concentration along the growth direction with the segregation tendency of the impurities was observed in an electro-migrated CZT boule. Notably, both Ga and Fe, which exist in positively charged states, exhibited the opposite distribution to that of their segregation tendency in Cd(Zn)Te. Furthermore, a CZT detector fabricated from the middle portion of the electromigrated CZT boule showed an improved mobility-lifetime product of 0.91 10-2 cm2 /V, compared to that of 1.4 10-3 cm2 /V, observed in an as-grown (non-electro-migrated) CZT detector. The optimum radiation detector material would have minimum concentration of deep traps required for compensation.},
doi = {10.1063/1.4917460},
journal = {Journal of Applied Physics},
number = 14,
volume = 117,
place = {United States},
year = {Tue Apr 14 00:00:00 EDT 2015},
month = {Tue Apr 14 00:00:00 EDT 2015}
}
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https://doi.org/10.1063/1.4917460
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