Abstract
Thermodynamic, kinetic, and dielectric properties of the As2S3–As2Se3 system have been investigated. The dependences of the Gibbs free mixing energy on the composition of the As2S3–As2Se3 system have been calculated. It has been found that glasses based on As2Se3 are formed in the concentration range up to 15 mol % As2S3. The glass–crystal transition based of As2Se3 samples has been studied in the framework of the linear isoconversion model. The As2S3–As2Se3 phase diagram has been approximated by the thermodynamic method. The concentration-temperature dependences of the Gibbs free energy of alloys (1 – x)As2Se3⋅ xAs2S3 have been constructed. The process of glass–crystal transition in alloys of the As2S3–As2Se3 system has been analyzed thermodynamically. The temperature dependence of the conductivity of the sample As2Se3 at constant current and dielectric properties of 0.8As2Se3 ⋅ 0.2As2S3 solid solutions in alternating electric fields with a frequency of f = 20–106 Hz have been studied. The nature of dielectric losses has been established, as well as the charge transfer hopping mechanism in the studied samples. The density of localized states near the Fermi level, the energy spread of these states, the average distance, and time of carrier jumps over the forbidden zone have been estimated.
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ACKNOWLEDGMENTS
This work was supported by the SOCAR (project 12LR–AMEA), Foundation for the Development of Science under the President of the Republic of Azerbaijan (grant nos. EİF-BGM-3-BRFTF-2+/2017-15/05/1-M-13, EİF-BGM-4-RFTF-1/2017-21/05/1-M-07) and RFBR (Az_a2018, project no. 18-57-06001).
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Asadov, M.M., Mustafaeva, S.N., Tagiyev, D.B. et al. Thermodynamic and Dielectric Properties of As2S3–As2Se3. Russ. J. Inorg. Chem. 65, 733–742 (2020). https://doi.org/10.1134/S0036023620050022
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DOI: https://doi.org/10.1134/S0036023620050022