The “ins and outs” of electropolymerized PEDOT organic electrochemical transistors

The “ins and outs” of electropolymerized PEDOT organic electrochemical transistors | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article The “ins and outs” of electropolymerized PEDOT organic electrochemical transistors Fabio Cicoira, Mejing Wang, Jiaxin Fan, Michel Bilodeau Calame, and 6 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5390816/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Organic electrochemical transistors (OECTs) using poly(3,4-ethylenedioxythiophene) (PEDOT) film as the channel material have been widely studied. However, OECTs based on electropolymerized PEDOT, doped with either large or small ions, have received comparatively limited attention, leaving the ionic dynamics during doping and dedoping insufficiently understood. In this work, we report stable OECTs using electropolymerized PEDOT that exhibit minimal drain current degradation after 1,000 cycles in NaCl aqueous solution. Compared to inkjet-printed OECTs, electropolymerized devices show significantly enhanced cycling stability, with the addition of the small anion dopant (ClO4⁻) further increasing PEDOT stability and cycling performance. Electrochemical Quartz Crystal Microbalance measurements reveal unique ionic transport behavior in PEDOT:ClO4, where dopant ion movement plays a more prominent role compared to PEDOT:PSS. This study highlights the advantages of electropolymerization and small anion incorporation, providing valuable insights into the functional mechanisms of OECTs across different PEDOT systems. Physical sciences/Materials science Physical sciences/Materials science/Materials for devices Physical sciences/Materials science/Soft materials Physical sciences/Chemistry/Polymer chemistry/Conjugated polymers Full Text Additional Declarations No competing interests reported. Supplementary Files SupportingInformation20241031.docx Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-5390816","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":374757136,"identity":"0c3cd72c-a7e9-4dfa-bbb8-c171f29640f5","order_by":0,"name":"Fabio 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