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Journal of Coatings Technology and Research

Published in:

01-03-2010

CO₂-laser treatment of indium tin oxide nanoparticle coatings on flexible polyethyleneterephthalate substrates

Authors: Tobias Königer, Thomas Rechtenwald, Ihab Al-Naimi, Thomas Frick, Michael Schmidt, Helmut Münstedt

Published in: Journal of Coatings Technology and Research | Issue 2/2010

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Abstract

A CO₂-laser treatment was used to improve the electrical conductivity of coatings of indium tin oxide (ITO) nanoparticles on flexible polyethyleneterephthalate (PET) substrates. The electrical conductivity and the transparency of CO₂-laser-treated ITO nanoparticle coatings were characterized with regard to the application as transparent electrodes. Furthermore, the stability of the electrical conductivity under oscillatory bending was investigated. A specific resistance of 0.12 Ω cm is obtained by CO₂-laser treatment without thermally damaging the PET film. The improvement of the electrical conductivity can be explained by a slight sinter neck formation. For a film thickness of 3 μm, a sheet resistance of 400 Ω/□ and a transmission in the visible range of 80% were achieved. The stability of the electrical conductivity of CO₂-laser-treated ITO nanoparticle coatings under bending was investigated using a specially constructed device for the application of various oscillatory bending loads. For a bending radius of 10 mm, the sheet resistance does not exceed 1000 Ω/□ after 300 bending cycles. Compared to commercial sputtered ITO coatings, CO₂-laser-treated ITO nanoparticle coatings show a significant higher stability under oscillatory bending.

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Title: CO2-laser treatment of indium tin oxide nanoparticle coatings on flexible polyethyleneterephthalate substrates
Authors: Tobias Königer
Thomas Rechtenwald
Ihab Al-Naimi
Thomas Frick
Michael Schmidt
Helmut Münstedt
Publication date: 01-03-2010
Publisher: Springer US
Published in: Journal of Coatings Technology and Research / Issue 2/2010
Print ISSN: 1547-0091
Electronic ISSN: 1935-3804
DOI: https://doi.org/10.1007/s11998-009-9181-5

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