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Inkjet-printed PEDOT:PSS/SWCNTs on Paper: Substrate Effects on Conductivity

Published online by Cambridge University Press:  01 March 2011

Peter D. Angelo  and
Ramin R. Farnood
Peter D. Angelo
Affiliation:
University of Toronto, Department of Chemical Engineering and Applied Chemistry Toronto, ON, M5S 3E5, Canada
Ramin R. Farnood
Affiliation:
University of Toronto, Department of Chemical Engineering and Applied Chemistry Toronto, ON, M5S 3E5, Canada
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Abstract

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), or PEDOT:PSS, and single-walled carbon nanotubes (SWCNTs) were incorporated into an inkjet ink. The combination of PEDOT, a conjugated, conductive polymer, and highly conductive CNTs, yielded a conductive film after printing and curing of the ink. Several paper types were used as substrates for depositing printed patterns of the PEDOT:PSS/SWCNT ink. Wide variability in conductivity was observed for different commercial paper types, ranging from a maximum 0.9 S/cm on Epson® Premium Photo cast-coated glossy paper to 3 × 10-5 S/cm on Epson® Premium Presentation coated cardstock. Increasing the SWCNT content of the ink improved conductivity on a non-permeable cellulose acetate substrate to a point, after which the combined effects of ink filtration and jetting limited the number of nanotubes delivered to the substrate. On permeable paper, the irregularity of the substrate overcame the beneficial effects of SWCNTs as “bridges” between conductive PEDOT regions. Correlations between the substrates’ physical structure and conductivity were established for the printed sheets, with densely coated sheets presenting the highest conductivity, and porous sheets the lowest.

Keywords

ink-jet printingnanoscaletransparent conductor
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1288: Symposium G – Novel Fabrication Methods for Electronic Devices , 2011 , mrsf10-1288-g09-04
Copyright
Copyright © Materials Research Society 2011

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