Temperature-Dependent Photoconductivity of n-InSe Single Crystals

Abdinov A. S., Babaeva R.

Inorganic Materials, vol.55, no.8, pp.758-764, 2019 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 55 Issue: 8
  • Publication Date: 2019
  • Doi Number: 10.1134/s0020168519080016
  • Journal Name: Inorganic Materials
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.758-764
  • Keywords: electrical conductivity, kinetics, local levels, photocurrent–light intensity characteristic, random defects, spectral distribution
  • Open Archive Collection: Article
  • Azerbaijan State University of Economics (UNEC) Affiliated: Yes

Abstract

Abstract—: The photoconductivity and electrical transport parameters of indium monoselenide single crystals have been measured as functions of temperature in the range 77–300 K. The results demonstrate that, below 240–250 K, not only the dark electrical conductivity and free carrier mobility but also the key photoconductivity parameters of the semiconductor vary from sample to sample. With decreasing dark electrical conductivity, the temperature-dependent photoconductivity of the crystals begins to exhibit behavior atypical of ordered crystalline semiconductors. Such behavior is shown to be due to the fact that the n-InSe single crystals contain random macroscopic (large-scale) defects identical in phase composition and crystal structure to the major material.