LIGHT INDUCED TELLURIUM ENRICHMENT ON CDZNTE CRYSTALSURFACES DETECTED BY RAMAN SPECTROSCOPY Page: 2 of 20
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WSRC-STI-2007-00614
LIGHT INDUCED TELLURIUM ENRICHMENT ON CdZnTe CRYSTAL
SURFACES DETECTED BY RAMAN SPECTROSCOPY
Samantha A. Hawkins*, Eliel Villa-Aleman, Martine C. Duff, and Doug B. Hunter
Savannah River National Laboratory, Aiken, SC 29808
Arnold Burger, Michael Groza, and Vladimir Buliga
Fisk University, Nashville, TN 37208-3051
David R. Black
National Institute of Standards and Technology Gaithersburg, MD 20899-8520
*Corresponding author's phone: (803)725-5722; fax: (803)725-4704; e-mail:
Samantha. Hawkins(olsrnl.doe. qov
Abstract
Synthetic CdZnTe or "CZT" crystals can be grown under controlled conditions to
produce high quality crystals to be used as room temperature radiation detectors. Even
the best crystal growth methods result in defects, such as tellurium secondary phases,
that affect the crystal's performance. In this study, CZT crystals were analyzed by micro
Raman spectroscopy. The growth of Te rich areas on the surface was induced by low
powered lasers. The growth was observed versus time with low power Raman
scattering and was observed immediately under higher power conditions. The detector
response was also measured after induced Te enrichment.
Key words: Raman spectroscopy, radiation detectors, semiconductors.WSRC-STI-2007-00614
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Hawkins, S; Eliel Villa-Aleman, E; Martine Duff, M & Douglas02 Hunter, D. LIGHT INDUCED TELLURIUM ENRICHMENT ON CDZNTE CRYSTALSURFACES DETECTED BY RAMAN SPECTROSCOPY, article, October 29, 2007; [Aiken, South Carolina]. (https://digital.library.unt.edu/ark:/67531/metadc900215/m1/2/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.