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Modifications in the structural, morphological, optical properties of Ag45Se40Te15 thin films by proton ion irradiation for optoelectronics and nonlinear applications

Das, S and Senapati, S and Alagarasan, D and Ganesan, R and Varadharajaperumal, S and Naik, R (2022) Modifications in the structural, morphological, optical properties of Ag45Se40Te15 thin films by proton ion irradiation for optoelectronics and nonlinear applications. In: Ceramics International .

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Official URL: https://doi.org/10.1016/j.ceramint.2022.11.212


This current work reports the 30 keV proton ion irradiation induced structural, morphological, and optical properties change in Ag45Se40Te15 films at different fluences. The thin films were irradiated with different ion fluences, such as 5 × 1015 ions/cm2,1 × 1016 ions/cm2 and 5 × 1016 ions/cm2. The electronic loss (Se) dominates over the nuclear loss (Sn) in proton irradiation. The X-ray diffraction study shows the phase transformation from amorphous to crystalline upon ion irradiation. The Raman analysis confirms the change in chemical and vibrational bonds due to structural alterations in the films. The surface morphology has been studied by field emission scanning electron microscopy and the composition of the films has been checked by the energy dispersive X-ray analysis. The particle size increased upon the increase in ion irradiation fluence. The surface roughness of the films has been studied by atomic force microscopy. The transmission data is used to calculate the linear optical parameters. The absorption edge shifts towards the high wavelength region inferring the reduction in the optical bandgap. The linear refractive index of the films increased with ion fluence. The optical density increased at the high wavelength region while the skin depth decreased with fluence. The carrier concentration per effective mass decreased while the plasma frequency increased with proton irradiation. The nonlinearity (χ (3) and n2) values increased significantly with the increase in fluences. Such kind of materials with optimization in their optical parameters are primarily essential for cutting-edge photonic, optoelectronic, and nonlinear optical applications.

Item Type: Journal Article
Publication: Ceramics International
Publisher: Elsevier Ltd
Additional Information: The copyright for this article belongs to Elsevier Ltd.
Keywords: Carrier concentration; Chemical analysis; Energy dispersive X ray analysis; Field emission microscopes; Ion bombardment; Ions; Morphology; Nonlinear optics; Particle size; Particle size analysis; Refractive index; Scanning electron microscopy; Selenium compounds; Silver compounds; Surface morphology; Surface roughness; Tellurium compounds; Thin films; X ray diffraction analysis, Ag45se40te15 film; Fluences; Ion fluences; Ions irradiation; Non-linear parameters; Optical parameter; Optoelectronic applications; Protons irradiations; Thin-films; Wavelength regions, Energy gap
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 04 Jan 2023 05:11
Last Modified: 04 Jan 2023 05:11
URI: https://eprints.iisc.ac.in/id/eprint/78690

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