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Dispersion and microwave processing of nano-sized ITO powder for the fabrication of transparent conductive oxides

Ghanizadeh, S; Peiris, TAN; Jayathilake, DSY; Hutt, DA; Wijayantha, KGU; Southee, DJ; Conway, PP; ... Carmalt, CJ; + view all (2016) Dispersion and microwave processing of nano-sized ITO powder for the fabrication of transparent conductive oxides. Ceramics International , 42 (16) pp. 18296-18302. 10.1016/j.ceramint.2016.08.157. Green open access

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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.

Type: Article
Title: Dispersion and microwave processing of nano-sized ITO powder for the fabrication of transparent conductive oxides
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.ceramint.2016.08.157
Publisher version: http://doi.org/10.1016/j.ceramint.2016.08.157
Language: English
Additional information: © 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved. This manuscript version is made available under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International license (CC BY-NC-ND 4.0). This license allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licenses are available at https://creativecommons.org/licenses/. Access may be initially restricted by the publisher.
Keywords: Science & Technology, Technology, Materials Science, Ceramics, Materials Science, Nanoparticles, Thin films, Indium/Indium compounds, Transparent conducting oxides, Dispersants/Dispersion, THIN-FILMS, COATING PROCESS, NANOPARTICLE, INK
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1534468
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