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Impact on nonlinear/linear optical and structural parameters in quaternary In15Ag10S15Se60 thin films upon annealing at different temperatures

Parida, A and Sahoo, D and Alagarasan, D and Vardhrajperumal, S and Ganesan, R and Naik, R (2022) Impact on nonlinear/linear optical and structural parameters in quaternary In15Ag10S15Se60 thin films upon annealing at different temperatures. In: Ceramics International .

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Official URL: https://doi.org/10.1016/j.ceramint.2022.02.072

Abstract

In the present study, the effect of thermal annealing on structural, linear, and nonlinear optical properties of quaternary chalcogenide In15Ag10S15Se60 thin film has been reported. The bulk sample synthesized by the melt quenching technique was used for the thin film preparation by the thermal evaporation method. Post deposition, the thin films were annealed at different temperatures like 100 °C, 150 °C, 200 °C, and 250 °C for 2 hs. X-ray diffraction (XRD) and Raman spectroscopy were used for structural studies, which showed the increase in crystalline phases with the increase of annealing temperature. The morphological images taken by field emission scanning electron microscope (FESEM) showed the densification and enlargement of scattered grains for annealed films. Furthermore, the constituent elements and their percentage in the sample were confirmed by Energy dispersive X-ray analysis (EDX). The linear and nonlinear optical parameters were calculated from the transmittance data obtained from UV�Vis spectroscopy in the wavelength range of 600�1100 nm. There is a large reduction in third-order nonlinear susceptibility at the higher annealing temperature. Subsequently, the transmission increased, whereas the absorption decreased with the annealing temperature. The extinction coefficient decreased while there was an increase in optical bandgap for the annealed films due to the decrease in surface defects and disorder, which forms the localized states in the bandgap. The oscillator energy, dispersion energy, dielectric constant, optical conductivity were calculated and discussed in detail. The change in both linear and nonlinear parameters by thermal annealing could be useful for controlling the optical properties of In15Ag10S15Se60 thin film, which could be the preferable candidate for numerous photonic applications. © 2022 Elsevier Ltd and Techna Group S.r.l.

Item Type: Journal Article
Publication: Ceramics International
Publisher: Elsevier Ltd
Additional Information: The copyright for this article belongs to Elsevier Ltd
Keywords: Annealing; Deposition; Dispersion (waves); Energy dispersive X ray analysis; Energy gap; Film preparation; Indium compounds; Optical conductivity; Optical films; Scanning electron microscopy; Selenium compounds; Silver compounds; Structural properties; Sulfur compounds; Surface defects; Thermal evaporation; X ray diffraction analysis, Annealed films; Annealing temperatures; Linear optical; Linear optical properties; Optical parameter; Polycrystalline; Structural parameter; Thermal-annealing; Thin-films; Third-order nonlinear susceptibility, Thin films
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 09 Mar 2022 10:23
Last Modified: 09 Mar 2022 10:23
URI: http://eprints.iisc.ac.in/id/eprint/71463

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