Purification of CdZnTe by electromigration

Journal Article · Tue Apr 14 04:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4917460· OSTI ID:22402854

Kim, Sangsu; Hong, Jinki ^[1]; Lee, Jinseo; Hong, Taekwon ^[2]; Bolotnikov, A. E.; Camarda, G. S.; James, R. B. ^[3]

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1. Department of Applied Physics, Korea University, Sejong 339-700 (Korea, Republic of)
2. AbyzR Corporation, Gyeonggi-do 445-811 (Korea, Republic of)
3. Brookhaven National Laboratory, Upton, New York 11973 (United States)

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 μm/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. A CZT detector fabricated from the middle portion of the electro-migrated CZT boule showed an improved mobility-lifetime product of 0.91 × 10{sup −2} cm{sup 2}/V, compared with that of 1.4 × 10{sup −3} cm{sup 2}/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.

• OSTI ID: 22402854
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 14 Vol. 117; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CADMIUM COMPOUNDS
CARRIER LIFETIME
CARRIER MOBILITY
COMPARATIVE EVALUATIONS
CONCENTRATION RATIO
COPPER
ELECTRIC FIELDS
ELECTROPHORESIS
IMPURITIES
PURIFICATION
RADIATION DETECTORS
SEGREGATION
TRAPS
ZINC TELLURIDES