Normal and inverted regimes of charge transfer controlled by density of states at polymer electrodes
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Univ Arizona, Dept Mat Sci & EngnIssue Date
2017-10-19
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NATURE PUBLISHING GROUPCitation
Normal and inverted regimes of charge transfer controlled by density of states at polymer electrodes 2017, 8 (1) Nature CommunicationsJournal
Nature CommunicationsRights
© The Author(s) 2017. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Conductive polymer electrodes have exceptional promise for next-generation bioelectronics and energy conversion devices due to inherent mechanical flexibility, printability, biocompatibility, and low cost. Conductive polymers uniquely exhibit hybrid electronic-ionic transport properties that enable novel electrochemical device architectures, an advantage over inorganic counterparts. Yet critical structure-property relationships to control the potential-dependent rates of charge transfer at polymer/electrolyte interfaces remain poorly understood. Herein, we evaluate the kinetics of charge transfer between electrodeposited poly-(3-hexylthiophene) films and a model redox-active molecule, ferrocenedimethanol. We show that the kinetics directly follow the potential-dependent occupancy of electronic states in the polymer. The rate increases then decreases with potential *(both normal and inverted kinetic regimes), a phenomenon distinct from inorganic semiconductors. This insight can be invoked to design polymer electrodes with kinetic selectivity toward redox active species and help guide synthetic approaches for the design of alternative device architectures and approaches.Note
UA Open Access Publishing Fund.ISSN
2041-1723PubMed ID
29051498Version
Final published versionSponsors
Defense and Security Research Institute through the Technology and Research Initiative Fund (TRIF) of ArizonaAdditional Links
http://www.nature.com/articles/s41467-017-01264-2ae974a485f413a2113503eed53cd6c53
10.1038/s41467-017-01264-2
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