TY - JOUR
T1 - Anomalous Te Inclusion Size and Distribution in CdZnTeSe
AU - Hwang, S.
AU - Yu, H.
AU - Bolotnikov, A. E.
AU - James, R. B.
AU - Kim, K.
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIP) under Grant NRF- 2018M2A2B3A01072384.
Funding Information:
Manuscript received June 2, 2019; revised July 19, 2019 and September 17, 2019; accepted September 27, 2019. Date of publication October 1, 2019; date of current version November 18, 2019. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIP) under Grant NRF-2018M2A2B3A01072384.
PY - 2019/11
Y1 - 2019/11
N2 - The effect of selenium in CdZnTe was investigated by characterizing the Cd0.9Zn0.1Te0.98Se0.02 crystal. The bandgap of Cd0.9Zn0.1Te0.98Se0.02 is smaller than Cd0.9Zn0.1Te. In addition, its value in ingot follows the zinc-segregation tendency than that of selenium. There was a recognizable difference in the amounts of compensating dopants, the distribution of Te inclusions, and the performance of the detector. The amounts of indium doping for the compensation were reduced by the addition of selenium, which provided the highest partial pressure in the melts. Thus, the generation of Cd vacancies, which is a native defect in CdZnTe, was prevented. In addition, the size of Te inclusions varied from the tip, middle, and heel of the CdZnTeSe ingot. The addition of selenium may change the thermal conductivity of CdZnTeSe melts, which is responsible for reducing the bulging of the retrograde solidus line near stoichiometry. The planar CdZnTeSe detector showed a 59.5-keV gamma peak for Am-241 with an 11% of energy resolution.
AB - The effect of selenium in CdZnTe was investigated by characterizing the Cd0.9Zn0.1Te0.98Se0.02 crystal. The bandgap of Cd0.9Zn0.1Te0.98Se0.02 is smaller than Cd0.9Zn0.1Te. In addition, its value in ingot follows the zinc-segregation tendency than that of selenium. There was a recognizable difference in the amounts of compensating dopants, the distribution of Te inclusions, and the performance of the detector. The amounts of indium doping for the compensation were reduced by the addition of selenium, which provided the highest partial pressure in the melts. Thus, the generation of Cd vacancies, which is a native defect in CdZnTe, was prevented. In addition, the size of Te inclusions varied from the tip, middle, and heel of the CdZnTeSe ingot. The addition of selenium may change the thermal conductivity of CdZnTeSe melts, which is responsible for reducing the bulging of the retrograde solidus line near stoichiometry. The planar CdZnTeSe detector showed a 59.5-keV gamma peak for Am-241 with an 11% of energy resolution.
KW - CdZnTe
KW - CdZnTeSe
KW - Te inclusions
KW - pulse height spectra
KW - selenium
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U2 - 10.1109/TNS.2019.2944969
DO - 10.1109/TNS.2019.2944969
M3 - Article
AN - SCOPUS:85075649183
VL - 66
SP - 2329
EP - 2332
JO - IEEE Transactions on Nuclear Science
JF - IEEE Transactions on Nuclear Science
SN - 0018-9499
IS - 11
M1 - 8854136
ER -