Molecular Design of Semiconducting Polymers for High-Performance Organic Electrochemical Transistors

Christian B. Nielsen, Alexander Giovannitti, Dan-Tiberiu Sbircea, Enrico Bandiello, Muhammad Rizwan Niazi, David A. Hanifi, Michele Sessolo, Aram Amassian, George G. Malliaras, Jonathan Rivnay, Iain McCulloch

Research output: Contribution to journalArticlepeer-review

126 Scopus citations

Abstract

The organic electrochemical transistor (OECT), capable of transducing small ionic fluxes into electronic signals in an aqueous envi-ronment, is an ideal device to utilize in bioelectronic applications. Currently, most OECTs are fabricated with commercially availa-ble conducting poly(3,4-ethylenedioxythiophene) (PEDOT)-based suspensions and are therefore operated in depletion mode. Here, we present a series of semiconducting polymers designed to elucidate important structure-property guidelines required for accumulation mode OECT operation. We discuss key aspects relating to OECT performance such as ion and hole transport, elec-trochromic properties, operational voltage and stability. The demonstration of our molecular design strategy is the fabrication of accumulation mode OECTs that clearly outperform state-of-the-art PEDOT based devices, and show stability under aqueous oper-ation without the need for formulation additives and cross-linkers.
Original languageEnglish (US)
Pages (from-to)10252-10259
Number of pages8
JournalJournal of the American Chemical Society
Volume138
Issue number32
DOIs
StatePublished - Aug 8 2016

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