Prabhudessai, AG and Balaji, S and Prasad, S and Chahal, S and Biswas, K and Ramesh, K and Yadav, A and Chakraborty, S and Kongar, PS and Chatterjee, S and Dutta, S and Dasgupta, R and Sarkar, P and Annapurna, K (2024) Thermal, structural, and conductivity properties of As14Sb26S(60�x)-(AgI)x chalcogenide glasses. In: Journal of Applied Physics, 135 (9).
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Abstract
The present work describes the preparation of a new series of chalcogenide glasses in an As14Sb26S(60�x) (AgI)x system intending to explore its thermal, structural, optical, mechanical, and electrical properties. The differential scanning calorimetry results of the studied glasses show the sharp decrease in glass transition temperature (Tg) with the successive incremental inclusion of AgI in the composition, implying the structural changes in the glass network. A thorough Raman analysis corroborates the occurrence of changes in the glass network due to the formation of AsI3 units and Ag-S-As bonds with increasing AgI content. Also, structural changes can be reflected with the change in the optical bandgap (Eg) that was calculated using Tauc equations where it was found that Eg is in harmony with the observed structural variations of glasses. The studied glasses possess a transmittance window (�0.68-12 μm) with transmittance above 60 in the mid-infrared region. These structural changes are closely related to the significant enhancement of conductivity of the present glasses from 10�8 to 10�6 S/cm at 373 K with a decrease in activation energies. Impedance spectra for the glass with highest AgI revealed the presence of two different relaxation processes. AC conductivity data followed an Arrhenius behavior as well as Jonscher�s power law. The present work provides insights into glass network modifications due to silver iodide inclusion and its role in the enhancement of conductivity. © 2024 Author(s).
| Item Type: | Journal Article |
|---|---|
| Publication: | Journal of Applied Physics |
| Publisher: | American Institute of Physics Inc. |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Keywords: | Activation energy; Chalcogenides; Differential scanning calorimetry; Glass transition; Iodine compounds; Silver halides, Chalcogenide glass; Conductivity properties; Glass network; Glass transition temperature Tg; Glasses In; Mechanical and electrical properties; Optical-bandgap; Raman analysis; Structural variations; Thermal, Glass |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 24 Apr 2024 06:34 |
| Last Modified: | 24 Apr 2024 06:34 |
| URI: | https://eprints.iisc.ac.in/id/eprint/84640 |
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