Effect of Annealing on the Electrical Properties of (Bi + Sn)-Pb<sub>0.75</sub>Sn<sub>0.25</sub>Te⟨Sn⟩ and (In plus Ag + Au)-Pb<sub>0.75</sub>Sn<sub>0.25</sub>Te⟨Sn⟩ Structures

Akhundova N., Aliyeva T. D.

INORGANIC MATERIALS, vol.59, no.1, pp.21-25, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 59 Issue: 1
  • Publication Date: 2023
  • Doi Number: 10.1134/s0020168523010016
  • Journal Name: INORGANIC MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.21-25
  • Azerbaijan State University of Economics (UNEC) Affiliated: Yes

Abstract

We have grown single crystals of the Pb0.75Sn0.25Te solid solution containing up to 1.0 at % hyperstoichiometric Sn and produced metal-semiconductor structures based on the crystals with the use of Bi + Sn and In + Ag + Au eutectics. The effect of annealing on their electrical properties has been studied in the temperature range similar to 77-300 K. We assume that, filling vacancies in the Pb and Sn sublattices of the crystals, small amounts of excess Sn atoms reduce carrier concentration n, causing an increase in the resistivity rho of the crystals and the specific contact resistance r(c) of the structures. High Sn concentrations lead to the formation of additional donor centers in the crystals, increasing n and, accordingly, reducing rho and r(c).