'Star-like' defects in Cd-annealed CdZnTe crystals - An experimental study of their origin and formation mechanism

G. Yang, A. E. Bolotnikov, P. M. Fochuk, Y. Cui, G. S. Camarda, A. Hossain, K. H. Kim, B. Raghothamachar, U. Roy, R. B. James

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4 Citations (Scopus)

Abstract

We conducted low-temperature annealing experiments at temperatures slightly above and below the melting point of Te to clarify the effects of the state of Te inclusions (solid or liquid) upon the formation of 'star-like' defects in Cd-annealed CdZnTe (CZT). We also carried out post-growth annealing experiments with and without using Cd vapor to clarify the mechanism of formation of such defects. We demonstrated that these 'star-like' defects are due to the reaction between in-diffused Cd atoms and the molten Te inclusions, but we found no observable 'one-to-one' correlation between 'star-like' defects and Te inclusions. The non-uniform distribution of Te inclusions in the CZT matrix could account for this phenomenon since the punching distance of the dislocations depends on the volume fraction of inclusions within the matrix.

Original languageEnglish
Pages (from-to)221-226
Number of pages6
JournalCrystal Research and Technology
Volume48
Issue number4
DOIs
Publication statusPublished - 2013 Apr

Keywords

  • CdZnTe
  • annealing
  • dislocations
  • inclusions

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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    Yang, G., Bolotnikov, A. E., Fochuk, P. M., Cui, Y., Camarda, G. S., Hossain, A., Kim, K. H., Raghothamachar, B., Roy, U., & James, R. B. (2013). 'Star-like' defects in Cd-annealed CdZnTe crystals - An experimental study of their origin and formation mechanism. Crystal Research and Technology, 48(4), 221-226. https://doi.org/10.1002/crat.201300009