Dynamic and Tunable Threshold Voltage in Organic Electrochemical Transistors

Advanced Materials
Sean E DorisRobert A Street

Abstract

In recent years, organic electrochemical transistors (OECTs) have found applications in chemical and biological sensing and interfacing, neuromorphic computing, digital logic, and printed electronics. However, the incorporation of OECTs in practical electronic circuits is limited by the relative lack of control over their threshold voltage, which is important for controlling the power consumption and noise margin in complementary and unipolar circuits. Here, the threshold voltage of OECTs is precisely tuned over a range of more than 1 V by chemically controlling the electrochemical potential at the gate electrode. This threshold voltage tunability is exploited to prepare inverters and amplifiers with improved noise margin and gain, respectively. By coupling the gate electrode with an electrochemical oscillator, single-transistor oscillators based on OECTs with dynamic time-varying threshold voltages are prepared. This work highlights the importance of electrochemistry at the gate electrode in determining the electrical properties of OECTs, and opens a path toward the system-level design of low-power OECT-based electronics.

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Citations

Mar 24, 2020·Advanced Materials·Scott T KeeneYoeri van de Burgt
Aug 22, 2018·Advanced Science·Vishak VenkatramanJonathan Rivnay
Oct 6, 2020·Chemical Society Reviews·Tim LeydeckerEmanuele Orgiu
Jun 2, 2021·Advanced Materials·Letícia M M FerroCarlos C Bof Bufon
Jul 2, 2021·Biosensors & Bioelectronics·Reem B RashidJonathan Rivnay
Aug 14, 2021·Nature Communications·Yuxin YangXing Fan
Oct 31, 2021·Proceedings of the National Academy of Sciences of the United States of America·Yao YaoAntonio Facchetti

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