Conductivity in Ag–As–S(Se, Te) chalcogenide glasses

We report on electric properties of Ag x(As 0.33Ch 0.67) 100 − x (Ch═S, Se, Te) glass systems in relation to their microstructure and changing constituting chalcogenide atoms. We observed decreasing contribution of the ionic conductivity when sulphur was replaced by selenium and tellurium. We also f...

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Bibliographic Details
Published in:Solid state ionics 2010-12, Vol.181 (37), p.1625-1630
Main Authors: Stehlik, S., Kolar, J., Bartos, M., Vlcek, Mil, Frumar, M., Zima, V., Wagner, T.
Format: Article
Language:English
Subjects:
Chalcogenide glasses
Impedance spectroscopy
Ionic conductivity
Percolation threshold
Phase separation
Silver doping
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Summary:We report on electric properties of Ag x(As 0.33Ch 0.67) 100 − x (Ch═S, Se, Te) glass systems in relation to their microstructure and changing constituting chalcogenide atoms. We observed decreasing contribution of the ionic conductivity when sulphur was replaced by selenium and tellurium. We also found a strong correlation between the conductivity and the phase separation into a silver-rich and a silver-poor phase which appears to be responsible for the semiconductor — ionic conductor transition in the sulphur and selenium based systems.
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2010.09.016