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Issue 11, 2008
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Doping and de-doping of carbon nanotube transparent conducting films by dispersant and chemical treatment

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Abstract

Single-walled carbon nanotubes (SWCNTs) dispersed with Nafion in a solvent mixture containing de-ionized water and 1-propanol (bisolvent) were sprayed on a poly(ethylene terephthalate) substrate to fabricate flexible transparent conducting films (TCFs). Different SWCNT-to-Nafion ratios were used to optimize the film performance of transparence and sheet resistance. The TCFs were then immersed in nitric acid. These steps resulted in p-type doping due to the presence of Nafion in the SWCNT network and de-doping (removal of doping effect) by the acid treatment. X-Ray photoelectron and Raman spectroscopy confirmed that the de-doping effect occurred with the partial removal of Nafion from the nanotube surface by the nitric acid treatment, which improved the film conductivity by a factor of ∼4 with negligible change in transmittance.

Graphical abstract: Doping and de-doping of carbon nanotube transparent conducting films by dispersant and chemical treatment

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Article information


Submitted
09 Nov 2007
Accepted
15 Jan 2008
First published
08 Feb 2008

J. Mater. Chem., 2008,18, 1261-1266
Article type
Paper

Doping and de-doping of carbon nanotube transparent conducting films by dispersant and chemical treatment

H. Geng, K. K. Kim, C. Song, N. T. Xuyen, S. M. Kim, K. A. Park, D. S. Lee, K. H. An, Y. S. Lee, Y. Chang, Y. J. Lee, J. Y. Choi, A. Benayad and Y. H. Lee, J. Mater. Chem., 2008, 18, 1261
DOI: 10.1039/B717387C

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