Carrier mobility in conjugated polymers continues to increase with recent reports of field-effect mobilities exceeding 10 cm<sup>2</sup>/V.s. On the other hand, conjugated polymers that exhibit mixed electronic/ionic conduction have been eliciting much interest lately. Charge transport is intrinsically dependent on processes occurring across multiple lengthscales. In order to access order parameters at the molecular scale we use charge modulation spectroscopy combined with theory. Furthermore, we study the mesoscale organization of polymers using a new technique in the transmission electron microscope. These techniques are used on homopolymers and donor-acceptor copolymers. Such multiscale studies of microstructure are instrumental in guiding our understanding of charge transport in conjugated polymers. The coupling of ionic transport and electronic transport is studied as well using synchrotron-based x-ray diffraction. The tradeoff between order, which favors electronic transport, and disorder, which promotes ionic transport is discussed as well.<br/>

Effect of microstructure on charged species (ions and electrons) transport in conjugated polymers

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.