Ambipolar blend-based organic electrochemical transistors and inverters

Eyal Stein, Oded Nahor, Mikhail Stolov, Viatcheslav Freger, Iuliana Maria Petruta, Iain McCulloch and Gitti L. Frey ()
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Eyal Stein: Technion – Israel Institute of Technology
Oded Nahor: Technion – Israel Institute of Technology
Mikhail Stolov: Technion – Israel Institute of Technology
Viatcheslav Freger: Technion – Israel Institute of Technology
Iuliana Maria Petruta: University of Oxford
Iain McCulloch: University of Oxford
Gitti L. Frey: Technion – Israel Institute of Technology

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract CMOS-like circuits in bioelectronics translate biological to electronic signals using organic electrochemical transistors (OECTs) based on organic mixed ionic-electronic conductors (OMIECs). Ambipolar OECTs can reduce the complexity of circuit fabrication, and in bioelectronics have the major advantage of detecting both cations and anions in one device, which further expands the prospects for diagnosis and sensing. Ambipolar OMIECs however, are scarce, limited by intricate materials design and complex synthesis. Here we demonstrate that judicious selection of p- and n-type materials for blend-based OMIECs offers a simple and tunable approach for the fabrication of ambipolar OECTs and corresponding circuits. These OECTs show high transconductance and excellent stability over multiple alternating polarity cycles, with ON/OFF ratios exceeding 103 and high gains in corresponding inverters. This work presents a simple and versatile new paradigm for the fabrication of ambipolar OMIECs and circuits with little constraints on materials design and synthesis and numerous possibilities for tunability and optimization towards higher performing bioelectronic applications.

Date: 2022
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DOI: 10.1038/s41467-022-33264-2

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