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Title: Dispersion and microwave processing of nano-sized ITO powder for the fabrication of transparent conductive oxides
Authors: Ghanizadeh, Shaghayegh
Peiris, Nirmal
Jayathilake, D.S.Y.
Hutt, David A.
Wijayantha, K.G.U.
Southee, Darren J.
Conway, Paul P.
Marchand, P.
Darr, J.A.
Parkin, I.P.
Carmalt, C.J.
Keywords: Nanoparticles
Thin films
Indium/Indium compounds
Transparent conducting oxides
Dispersants/Dispersion
Issue Date: 2016
Publisher: © Elsevier
Citation: GHANIZADEH, S. ... et al, 2016. Dispersion and microwave processing of nano-sized ITO powder for the fabrication of transparent conductive oxides. Ceramics International, doi: 10.1016/j.ceramint.2016.08.157.
Abstract: Aqueous dispersions of tin-doped indium oxide (ITO) nanopowder were prepared and the effect of the addition of PEG 400, Tween 80 and β-alanine as dispersants was investigated using zeta potential and particle size distribution measurements. Both PEG 400 and β-alanine were found to produce stable dispersions that were used to deposit ITO thin films on glass substrates by dip and spin coating methods. The ITO thin films were heat-treated using both conventional and microwave heat treatment in order to improve the inter-particle connections and hence the resistivity and transparency of the films. All the films exhibited an average transmittance of >80% over the visible spectrum after being subjected to the heat treatment process. ITO films prepared with no dispersant showed very high resistivity values for both heating methods, however addition of 2 wt% PEG 400 to the dispersion yielded a reduction in the resistivity values to 1.4×10−1 Ω cm and 3.8×10−2 Ω cm for conventionally and microwave treated films, respectively. The surface morphological studies confirmed that addition of dispersants improved the film uniformity and inter-particle connections of the ITO films considerably.
Description: This paper is under embargo until 1st September 2017.
Sponsor: This research was funded by the UK Engineering and Physical Sciences Research Council(EPSRC)under grant number EP/L017709/1.
Version: Accepted
DOI: 10.1016/j.ceramint.2016.08.157
URI: https://dspace.lboro.ac.uk/2134/22724
Publisher Link: http://dx.doi.org/10.1016/j.ceramint.2016.08.157
ISSN: 0272-8842
Appears in Collections:Closed Access (Design School)
Closed Access (Mechanical, Electrical and Manufacturing Engineering)

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