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ARTICLE

Influence of Ag content on direct current conductivity of Ag_x(As₂(Te_0.5Se_0.5)₃)_100-x system

G. R. Štrbac^a,*, O. Bošák^b, D. Štrbac^c, R. Vigi^a, M. Kubliha^b, S. Minárik^b

a University of Novi Sad, Faculty of Sciences, Department of Physics, Trg D. Obradovića 4, 21000 Novi Sad, Serbia
b Slovak University of Technology, Faculty of Materials Science and Technology, Bottova 25, 91724 Trnava, Slovakia
c University of Novi Sad, Faculty of Technical Sciences, Trg D. Obradovića 6, 21000 Novi Sad, Serbia

* Corresponding Author:

Chalcogenide Letters 2025, 22(5), 481-491. https://doi.org/10.15251/CL.2025.225.481

Received 12 February 2025; Accepted 22 May 2025;

Abstract

The temperature dependence of direct current (DC) conductivity, silver content, and the presence of crystalline phases in amorphous and annealed chalcogenides from the Ag_x(As₂(Te_0.5Se_0.5)₃)_100-x system was investigated. Amorphous samples exhibited semiconducting behavior, with conductivity increase as the silver content raised. This increase was primarily attributed to electron transitions into delocalized states from states localized near the Fermi level. Percolation behavior in conductivity was observed in the samples containing 7 at.% or more silver. For annealed samples with silver content below 9 at.%, temperature-independent DC conductivity was identified, accompanied by a decrease in conductivity as the silver content increased.

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Keywords

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