Role of Bismuth incorporation on the structural and optical properties in BixIn35-xSe65 thin films for photonic applications

Priyadarshini, P and Das, S and Alagarasan, D and Ganesan, R and Varadharajaperumal, S and Naik, R (2021) Role of Bismuth incorporation on the structural and optical properties in BixIn35-xSe65 thin films for photonic applications. In: Journal of the American Ceramic Society .

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Abstract

The present paper investigated the influence of Bi concentration on the structural, linear, and non-linear optical properties of thermally evaporated BixIn35-xSe65 (x = 0, 5, 7, 10, 15 at ) thin films. The structural analysis by the XRD measurements showed the crystalline nature at 7 and 15 Bi while the other concentrations showed amorphous nature. The corresponding bonding change was analyzed by Raman spectroscopy. The optical study by UV-Vis spectroscopy showed the decrease in transmittance and an increase in absorbance property. The linear optical parameters such as absorption coefficient, extinction coefficient, optical density increased while skin depth decreased with Bi additives. The direct, as well as the indirect optical bandgap, decreased along with the decrease in the Tauc parameter. The variation is well explained on the basis of density of defect states by the Mott and Davis model. The non-linear refractive index and non-linear susceptibility increased significantly with Bi which is good for non-linear optical applications. The static linear refractive index as calculated by the Dimirov and Sakha empirical relation showed an incremental behavior with Bi concentration and satisfied Moss's rule. The surface structure and elemental concentration were analyzed by FESEM and EDX analysis. The result of the above investigation suggests that these materials can be used as an absorbing layer for several optoelectronic and photonic applications. © 2021 The American Ceramic Society

Item Type:	Journal Article
Publication:	Journal of the American Ceramic Society
Publisher:	Blackwell Publishing Inc.
Additional Information:	The copyright for this article belongs to Blackwell Publishing Inc.
Keywords:	Additives; Bismuth; Bismuth compounds; Indium compounds; Nanocrystalline materials; Refractive index; Selenium compounds; Surface structure; Thin films; Ultraviolet visible spectroscopy, Absorbance properties; Absorption co-efficient; Elemental concentrations; Extinction coefficients; Non-linear optical properties; Nonlinear optical applications; Photonic application; Structural and optical properties, Bismuth metallography
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Physics
Date Deposited:	02 Sep 2021 09:55
Last Modified:	02 Sep 2021 09:55
URI:	http://eprints.iisc.ac.in/id/eprint/69619

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