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Characterization of secondary phases and other defects in CdZnTe

Duff, Martine C., Lynn, Kelvin G., Jones, Kelly, Soundararajan, Rajeswari, Bradley, John P., Ishii, Hope, Aguiar, Jeffery, Wozniakiewicz, Penelope J. (2010) Characterization of secondary phases and other defects in CdZnTe. In: Proceedings of SPIE (Society of Photo-Optical Instrumentation Engineers). 7805 (780503). SPIE, U.S. ISBN 978-0-8194-8301-0. (doi:10.1117/12.862379) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:53880)

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Semiconducting CdZnTe or "CZT" crystals are very suitable for use as a room temperature-based gamma radiation spectrometer. During the last decade, modifications in growth methods for CZT have significantly improved the quality of the produced crystals however there are material features that can influence the performance of these materials as radiation detectors. For example, various structural heterogeneities within the CZT crystals, such as, pipes, voids, polycrystallinity, and secondary phases (SP) can have a negative impact on the detector performance. In this study, a CZT material was grown by the modified vertical Bridgman growth (MVB) method with zone leveled growth in the absence of excess Te in the melt. Numerous SP were imaged using transmission IR at a volume % of 0.002. Samples from this material were analyzed using various analytical techniques to evaluate its electrical properties, purity and detector performance as radiation spectrometers and to determine the morphology, dimension and elemental /structural composition of one of the SP in this material. This material was found to have a high resistivity and good radiation spectrometer performance. It had SPs that were rich in calcium (Ca), carbon (C) and oxygen (O) (possibly CaCO3) or only C and O that were 5 μm or less in diameter. © 2010 Copyright SPIE - The International Society for Optical Engineering.

Item Type: Conference or workshop item (Proceeding)
DOI/Identification number: 10.1117/12.862379
Additional information: Unmapped bibliographic data: C7 - 780503 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - Proc SPIE Int Soc Opt Eng [Field not mapped to EPrints] AD - Savannah River National Laboratory, Aiken, SC 29808, United States [Field not mapped to EPrints] AD - Washington State University, Pullman, WA 99164-2920, United States [Field not mapped to EPrints] AD - Lawrence Livermore National Laboratory, Livermore, CA 94550, United States [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints] M3 - Conference Paper [Field not mapped to EPrints] A4 - The Society of Photo-Optical Instrumentation Engineers (SPIE) [Field not mapped to EPrints] C3 - Proceedings of SPIE - The International Society for Optical Engineering [Field not mapped to EPrints]
Uncontrolled keywords: calcite, carbon, Modified vertical Bridgman, transmission electron microscopy, transmission IR imaging, Analytical techniques, Detector performance, Electrical property, Gamma radiation, Growth method, High resistivity, Material features, Modified vertical Bridgman, Negative impacts, Polycrystallinity, Room temperature, Secondary phasis, Structural composition, Structural heterogeneity, Cadmium alloys, Cadmium compounds, Calcite, Carbonate minerals, Crystals, Electric properties, Gamma rays, Infrared imaging, Neutron detectors, Oxygen, Semiconductor growth, Spectrometers, Spectrometry, Transmission electron microscopy, Z transforms, Radiation detectors
Subjects: Q Science > QC Physics > QC355 Optics
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Giles Tarver
Date Deposited: 29 Jan 2016 10:25 UTC
Last Modified: 16 Nov 2021 10:22 UTC
Resource URI: (The current URI for this page, for reference purposes)

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Wozniakiewicz, Penelope J..

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