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.
| Original language | English |
|---|---|
| Title of host publication | Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XII |
| DOIs | |
| Publication status | Published - 2010 Nov 8 |
| Externally published | Yes |
| Event | Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XII - San Diego, CA, United States Duration: 2010 Aug 2 → 2010 Aug 4 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 7805 |
| ISSN (Print) | 0277-786X |
Other
| Other | Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XII |
|---|---|
| Country | United States |
| City | San Diego, CA |
| Period | 10/8/2 → 10/8/4 |
Fingerprint
Keywords
- annealing
- CZT
- dislocations
- radiation detection
- Te inclusions
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
Study on thermal annealing of cadmium zinc telluride (CZT) crystals. / Yang, G.; Bolotnikov, A. E.; Fochuk, P. M.; Camarda, G. S.; Cui, Y.; Hossain, A.; Kim, Kihyun; Horace, J.; McCall, B.; Gul, R.; Xu, L.; Kopach, O. V.; James, R. B.
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XII. 2010. 780507 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7805).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Study on thermal annealing of cadmium zinc telluride (CZT) crystals
AU - Yang, G.
AU - Bolotnikov, A. E.
AU - Fochuk, P. M.
AU - Camarda, G. S.
AU - Cui, Y.
AU - Hossain, A.
AU - Kim, Kihyun
AU - Horace, J.
AU - McCall, B.
AU - Gul, R.
AU - Xu, L.
AU - Kopach, O. V.
AU - James, R. B.
PY - 2010/11/8
Y1 - 2010/11/8
N2 - 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.
AB - 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.
KW - annealing
KW - CZT
KW - dislocations
KW - radiation detection
KW - Te inclusions
UR - http://www.scopus.com/inward/record.url?scp=78049391734&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78049391734&partnerID=8YFLogxK
U2 - 10.1117/12.861372
DO - 10.1117/12.861372
M3 - Conference contribution
AN - SCOPUS:78049391734
SN - 9780819483010
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XII
ER -