Self-Organization of PEDOT:PSS Induced by Green and Water-Soluble Organic Molecules

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Self-Organization of PEDOT:PSS Induced by Green and Water-Soluble Organic Molecules
Title:
Self-Organization of PEDOT:PSS Induced by Green and Water-Soluble Organic Molecules
Journal Title:
Journal of Physical Chemistry C
Publication Date:
25 March 2019
Citation:
J. Phys. Chem. C 2019, 123, 15, 9745–9755
Abstract:
Water-soluble poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is the most prominent commercial polymer used in photovoltaic cells and thermoelectric devices. Experimental studies in the last decade have shown that it is possible to enhance the low electrical conductivity of PEDOT:PSS by solvent treatment, either in-solution or by post-treatment methods. The origin and mechanism of electrical conductivity improvement varied according to different experimental studies. We had recently shown that phase separation of PEDOT:PSS is key to the electrical conductivity enhancement, where dissolution of insulating PSS shell results in the release of conducting PEDOT grains for aggregation. In this study, we demonstrated that dimethyl sulfone (DMSO2), which is a nontoxic, water-soluble, edible organic molecule, can be a greener alternative to the widely used dimethyl sulfoxide for solvent treatment of PEDOT:PSS chains, via a combined experimental and multiscale molecular modeling approaches. Moreover, crystalline DMSO2 nanowire surfaces that remain in the PEDOT:PSS films act as a template for the self-alignment of PEDOT chains that enhance the electrical conductivity further.
License type:
PublisherCopyrights
Funding Info:
The authors thank the Agency for Science, Technology and Research (A*STAR) Science and Engineering Research Council (SERC) of Singapore (grant number: 1527200021 and 1527200024) for the financial support. Computational resources are provided by the National Supercomputing Centre Singapore (NSCC) and A*STAR Computational Resource Centre (A*CRC).
Description:
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.9b01716
ISSN:
1932-7447
1932-7455
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