Kumar, Shiv and Dwivedi, G. D. and Joshi, Amish G. and Chatterjee, Sandip and Ghosh, A. K. (2017) Study of structural, dielectric, optical properties and electronic structure of Cr-doped LaInO3 perovskite nanoparticles. Materials Characterization , 131. pp. 108-115. ISSN 1044-5803

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Abstract

This work reports the change in the structural, dielectric and optical behaviour of Cr-doped LaInO3 nanoparticles synthesized via sol-gel method. X-ray diffraction patterns confirm that systems crystallize in orthorhombic Pnma space group. Raman spectroscopy measurements exhibit blue-shift in Raman modes with Cr-doping due to the compressive stress introduced by smaller Cr3+ cations. Trivalent oxidation state of Cr was confirmed from Cr (2p) core-level X-ray photoemission spectroscopy measurements, while valence band spectra suggest the absence of electronic states near Fermi level. High-resolution Ultraviolet photoemission spectra near Fermi level shows the electronic density of states arises sharply near Fermi level. Room temperature dielectric constant decreases with increasing Cr-concentration, which shows that conductivity has been increased after Cr-doping. Ultraviolet-visible spectroscopy measurements provide band gap of 4.8 eV for LaInO3 and Cr-doped LaInO(3)nanoparticles.Moreover, Cr-doped LaInO(3)systems exhibit an intermediate band gap of 3 eV, which might have been created from Cr(3d) states.

Item Type:	Article
Additional Information:	Copyright for this articles belong to M/S Elsevier.
Subjects:	Materials Science > Materials Science Multidisciplinary Metallurgy & Metallurgical Engineering
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	29 Apr 2019 07:14
Last Modified:	29 Apr 2019 07:14
URI:	http://npl.csircentral.net/id/eprint/2892

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