Characterization of Heterogeneities in Detector-Grade CdZnTe Crystals

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Journal of Materials Research

DOI:https://doi.org/10.1557/jmr.2009.0165· OSTI ID:980055

Duff, M; Hunter, D; Burger, A; Groza, M; Buliga, V; Bradley, J; Graham, G; Dai, Z; Lanzirotti, A

Synthetic Cd{sub 1-x}ZnxTe or 'CZT' crystals are highly suitable for g-spectrometers operating at room temperature. Secondary phases (SP) within CZT, presumed to be Te metal, have detrimental impacts on the charge collection efficiency of fabricated device. Using analytical techniques rather than arbitrary theoretical definitions, we identify two SP morphologies: (i) many void, 20-{mu}m 'negative' crystals with 65-nm nanoparticle residues of Si, Cd, Zn, and Te and (ii) 20-{mu}m hexagonal-shaped bodies, which are composites of metallic Te layers with cores of amorphous and polycrystalline CZT material that surround the voids.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 980055
• Report Number(s): BNL--92973-2010-JA
• Journal Information: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 4 Vol. 24; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CHARGE COLLECTION
CRYSTALS
EFFICIENCY
LAYERS
MATERIALS
RESIDUES
SPECTROMETERS
VOIDS
national synchrotron light source