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

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posted on 2016-10-07, 09:46 authored by Shaghayegh Ghanizadeh, Nirmal Peiris, D.S.Y. (Subhashi) Jayathilake, David HuttDavid Hutt, Upul Wijayantha-Kahagala-Gamage, Darren SoutheeDarren Southee, Paul ConwayPaul Conway, P. Marchand, J.A. Darr, I.P. Parkin, C.J. Carmalt
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.

Funding

This research was funded by the UK Engineering and Physical Sciences Research Council (EPSRC) under grant number EP/L017709/1.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Ceramics International

Volume

42

Issue

16

Pages

18296-18302

Citation

GHANIZADEH, S. ... et al, 2016. Dispersion and microwave processing of nano-sized ITO powder for the fabrication of transparent conductive oxides. Ceramics International, 42 (16), pp. 18296-18302.

Publisher

© Elsevier

Version

  • AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

2016-08-25

Publication date

2016-09-01

Copyright date

2016

Notes

This paper was accepted for publication in the journal Ceramics International and the definitive published version is available at http://dx.doi.org/10.1016/j.ceramint.2016.08.157.

ISSN

0272-8842

Language

  • en