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Laser sintering and patterning of gallium-doped zinc oxide/indium-tin oxide nanoparticle films with tailorable electrical and optical properties

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journal contribution
posted on 29.06.2020 by Jing Wang, Fabiana Lisco, David Hutt, Lewis Jones, Jake Bowers, Patrick Isherwood, Zhaoxia Zhou, Paul Conway
Gallium-doped zinc oxide (GZO) and tin-doped indium oxide (ITO) nanoparticles (NPs) were combined to create bi-component suspensions for the drop-casting and CO2-laser sintering of transparent conducting oxide (TCO) thin films with significantly reduced ITO content. An aqueous dispersion of ITO NPs enabled the suspension of GZO NPs without surfactants. Transmission electron microscopy indicated the formation of high aspect-ratio segments of ITO NPs from the suspension through oriented attachment, that persisted in the deposited and sintered thin films to establish an efficient electrical percolating network within the less conductive GZO NP matrix. Rapid CO2-laser sintering under argon gas of approximately 800 nm thick NP films yielded resistivities of 7.34 × 10−3 Ω·cm and 116 Ω·cm for pure ITO and pure GZO respectively. However, a bi-component film with only 19.6 at.% indium (relative to zinc) achieved a resistivity of 3.21 × 10−1 Ω·cm. By changing the ITO content, the near-infrared transmittance could be adjusted between 13% and 82% and the optical bandgap energy between 3.93 and 3.33 eV, enabling fine-tuning of the properties. Finally, a fast and material/energy efficient processing route was demonstrated for the fabrication of a GZO-ITO circuit pattern using CO2-laser patterning of a mask and CO2-laser sintering of the NP films.

Funding

Sustainable manufacturing of transparent conducting oxide (TCO) inks and thin films : EP/L017709/1

History

School

  • Mechanical, Electrical and Manufacturing Engineering
  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Research Unit

  • Centre for Renewable Energy Systems Technology (CREST)

Published in

Materials & Design

Volume

194

Pages

108865

Publisher

Elsevier BV

Version

VoR (Version of Record)

Rights holder

© The authors

Publisher statement

This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

Acceptance date

05/06/2020

Publication date

2020-06-06

Copyright date

2020

ISSN

0264-1275

eISSN

0264-1275

Language

en

Depositor

Dr David Hutt Deposit date: 28 June 2020

Article number

108865

Licence

Exports