Directly patternable, highly conducting polymers for broad applications in organic electronics

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 dichloroacet...

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Published inProceedings of the National Academy of Sciences - PNAS Vol. 107; no. 13; pp. 5712 - 5717
Main Authors Yoo, Joung Eun, Lee, Kwang Seok, Garcia, Andres, Tarver, Jacob, Gomez, Enrique D, Baldwin, Kimberly, Sun, Yangming, Meng, Hong, Nguyen, Thuc-Quyen, Loo, Yueh-Lin
Format Journal Article
LanguageEnglish
Published United States National Academy of Sciences 30.03.2010
National Acad Sciences
Subjects
Annealing
Anodes
Conducting polymers
Conductivity
Electric potential
Electrical resistivity
Electrodes
Electronics
Light emitting diodes
Material films
Physical Sciences
Polyethylene
Polymers
Solvents
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Summary: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 straightforward 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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Author contributions: Y.-L.L. designed research; J.E.Y., K.S.L., A.G., J.T., and K.B. performed research; E.D.G., Y.S., and H.M. contributed new reagents/analytic tools; J.E.Y., K.S.L., A.G., and T.-Q.N. analyzed data; and J.E.Y., J.T., T.-Q.N., and Y.-L.L. wrote the paper.
Edited by Allen J. Bard, University of Texas at Austin, Austin, TX, and approved February 10, 2010 (received for review December 1, 2009)
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.0913879107