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Spray-Deposited Nanocrystalline WO3 Thin Films Prepared Using Tungsten Hexachloride Dissolved in N-N Dimethylformamide and Influence of In Doping on Their Structural, Optical and Electrical Properties

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Title Spray-Deposited Nanocrystalline WO3 Thin Films Prepared Using Tungsten Hexachloride Dissolved in N-N Dimethylformamide and Influence of In Doping on Their Structural, Optical and Electrical Properties
 
Creator MUKHERJEE, R
KUSHWAHA, A
SAHAY, PP
 
Subject In-doped WO3 thin films
spray pyrolysis
structural and optical properties
electrical properties
OXIDE FILMS
ELECTROCHROMIC PROPERTIES
SENSING CHARACTERISTICS
PYROLYSIS TECHNIQUE
ZNO
SUBSTRATE
NANORODS
DEVICES
SENSORS
 
Description Undoped and In-doped nanocrystalline tungsten oxide (WO3) thin films were prepared by chemical spray pyrolysis using tungsten hexachloride (WCl6) dissolved in N-N dimethylformamide as the host precursor solution and indium chloride (InCl3) as the source of dopant. XRD analyses confirm the monoclinic phase of the prepared films with the predominance of triplet (002), (020) and (200) in the spectra. On indium doping, the crystallinity of the films decreases and becomes minimum at 1.5 at. % doping. EDX analyses confirm the incorporation of In dopants into the WO3 lattice network. SEM micrographs show non- spherical grains over the surface and the average grain size decreases with higher In doping. AFM images of the films exhibit large nicely separated conical columnar grains (except in 1 at. %) throughout the surface with coalescence of some columnar grains at few places. UV-visible measurements reveal that the optical transmittance of the 1 at. % In-doped film increases significantly throughout the wavelength range 300 - 800 nm relative to that of the undoped film Room temperature photoluminescence spectra show pronounced enhancement in the peak intensity of NBE emission on In doping. Electrical conductivity has been found to increase on In doping.
 
Publisher KOREAN INST METALS MATERIALS
 
Date 2014-12-29T04:50:10Z
2014-12-29T04:50:10Z
2014
 
Type Article
 
Identifier ELECTRONIC MATERIALS LETTERS, 10(2)401-410
1738-8090
2093-6788
http://dx.doi.org/10.1007/s13391-013-3221-0
http://dspace.library.iitb.ac.in/jspui/handle/100/17119
 
Language English