Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5454574 | Materials Characterization | 2017 | 30 Pages |
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 Cr3Â + 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 4.8Â eV for LaInO3 and Cr-doped LaInO3nanoparticles.Moreover, Cr-doped LaInO3systems exhibit an intermediate band gap of 3Â eV, which might have been created from Cr(3d) states.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Shiv Kumar, G.D. Dwivedi, Amish G. Joshi, Sandip Chatterjee, A.K. Ghosh,