Фізика і хімія твердого тіла (Sep 2017)

Optical Absorption and Piezoelectric Effect Investigation in Single Crystal of AgGaGe<sub>3</sub>Se<sub>7.6</sub>Te<sub>0.4</sub> Solid Solution

  • A. S. Krymus,
  • G. L. Myronchuk,
  • O. V. Parasyuk,
  • I. V. Kityk

DOI
https://doi.org/10.15330/pcss.17.4.539-543
Journal volume & issue
Vol. 17, no. 4
pp. 539 – 543

Abstract

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In present work spectral distribution of absorption coefficient in the range of 100 – 300 K was investigated and band gap values evaluated. Parameters of Urbach rule were calculated and linearity of temperature dependence of Urbach energy was showed. Thermo induced piezoelectric effect in a range of 297 - 357 K was investigated. Laser induced kinetics of piezomodule was investigated and absence of irreversible changes was showed. Influence of heating the crystal during laser illuminating on piezoelectric module was adjusted.Keywords: chalcogenides, single crystal, band gap, Urbach rule, piezoelectric effect.