Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 107, Issue 13, Pages 5712-5717Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0913879107
Keywords
electrical conductivity; solar cells; thin-film transistors; light-emitting diodes; polyaniline
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Funding
- Keck Foundation
- Beckman Foundation
- National Science Foundation [DMR0735148]
- Jackson State University
- University of California, Santa Barbara [DMR0611539]
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Postdeposition solvent annealing of water-dispersible conducting polymers induces dramatic structural rearrangement and improves electrical conductivities by more than two orders of magnitude. We attain electrical conductivities in excess of 50 S/cm when polyaniline films are exposed to dichloroacetic acid. Subjecting commercially available poly(ethylene dioxythiophene) to the same treatment yields a conductivity as high as 250 S/cm. This process has enabled the wide incorporation of conducting polymers in organic electronics; conducting polymers that are not typically processable can now be deposited from solution and their conductivities subsequently enhanced to practical levels via a simple and straight forward solvent annealing process. The treated conducting polymers are thus promising alternatives for metals as source and drain electrodes in organic thin-film transistors as well as for transparent metal oxide conductors as anodes in organic solar cells and light-emitting diodes.
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