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Investigating the Mechanism of Post-Treatment on PEDOT:PSS via Single-Particle Absorption Spectroscopy

preprint
submitted on 21.06.2019 and posted on 24.06.2019 by Morgan Rea, Feng Pan, Erik Horak, Kassandra Knapper, Hoang Nguyen, Cecilia Vollbrecht, Randall Goldsmith
The conductive polymer PEDOT:PSS, widely used in optoelectronic devices, exhibits improved conductivity upon post-treatment, but the mechanism of this improvement is difficult to fully ascertain. The effects of thermal annealing and DMSO post-treatment on PEDOT:PSS, from the nano- to mesoscale, are studied using single-particle absorption spectroscopy. An average decrease in size and apparent increase in rotational order of individual particles are observed with both treatments, including unexpected correlations between change in rotational order and initial properties. Simulation of these transformations and correlations occurring during the annealing process reveal that the effects of DMSO-post treatment can be explained by oligomer depletion and do not explicitly require conformational changes including oligomer rotation.

Funding

DMR-1610345

History

Email Address of Submitting Author

rhg@chem.wisc.edu

Institution

University of Wisconsin-Madison

Country

United States of America

ORCID For Submitting Author

0000-0001-9083-8592

Declaration of Conflict of Interest

The authors declare no conflict of interest.

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