Proceedings of MATSUS Fall 2024 Conference (MATSUSFall24)
DOI: https://doi.org/10.29363/nanoge.matsusfall.2024.415
Publication date: 28th August 2024
1
Electroactive polymer content: a tool to design the side chains of next-generation OMIECs
Olivier Bardagot,a,b‡* Brandon T. DiTullio,c‡ Austin L. Jones,c Justin Speregen,c John R.
Reynolds,c Natalie Banerji,b
‡ These authors contributed equally to this work.
a Institute of Chemistry and Processes for Energy Environment and Health (ICPEES), CNRS
University of Strasbourg, UMR 7515, 25 rue de Becquerel, Strasbourg Cedex 02, 67087,
France
bDepartment of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP), University of
Bern, 3012 Bern, Switzerland
c School of Chemistry and Biochemistry, School of Materials Science and Engineering,
Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia
Institute of Technology, Atlanta, Georgia, 30332, USA
*Corresponding author email: olivier.bardagot@cnrs.fr
The development of organic electrochemical transistors (OECTs)-based applications relies on
the rational design of high-performing organic mixed ionic-electronic conductors (OMIECs).[1]
In this talk, we present two series of ProDOT-based copolymers with linear or branched
oligo(ethylene oxy) (OE) side chains.[2,3] We demonstrate that:
1. We also develop the newly introduced concept of “electroactive polymer content” as an
important parameter to design high-performance OMIECs. Our result and literature
review suggest that a balance mass of backbone and side chain, resulting in an
electroactive polymer content of 40-50%, may be ideal for OE-substituted
polythiophenes.
2. By increasing the electroactive polymer content from 34% to 49%, the pulsing stability
increases with IDS retention boosted from 1.8% up to 99% after 200 ON/OFF cycles.
3. Optimizing the electroactive polymer content to 49% allows to enhance the OECT
signal amplification; as shown by the normalized transconductance of 453 ± 70 S cm-1
achieved for PE2-OE4 (with 4 OE units) in a saline aqueous electrolyte.
With this talk, we would like to encourage the OMIEC community to (i) calculate the
electroactive polymer content of an OMIEC when designing the length of the side chains and
(ii) consider ProDOT-based polymers as highly interesting OECT channel materials.
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