Фізика і хімія твердого тіла (Apr 2019)

Specific Features of Photoconductivity of Tl1-xIn1-xSnxSe2 Monocrystals at Low Temperatures

  • Oksana Zamurueva,
  • G. L. Myronchuk,
  • S. P. Danylchuk,
  • O. V. Zamurueva,
  • L. V. Piskach,
  • I. V. Kityk,
  • M. V. Piasecki,
  • O. V. Tsisar

DOI
https://doi.org/10.15330/pcss.20.1.55
Journal volume & issue
Vol. 20, no. 1
pp. 50 – 55

Abstract

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The photoconductivity spectra in the temperature range T≈36-200 K and the spectra of thermostimulated currents in the temperature range T≈70-300 K of Tl1-xIn1-xSnxSe2 single crystals obtained by directional crystallization of Bridgman-Stockbarger have been studied. The induced photoconductivity and long-term photoconductivity relaxation processes have been found. To interpret the found results, a model of two-center recombination has been suggested. It is illustrated that the role of the r-centers of slow recombination are formed by Tl vacancies. On the basis of the studies of the spectra of thermally stimulated currents, the thermal energy of electrons activation with t-levels of adhesion has been determined.

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