Issue 15, 2024

Vertical organic electrochemical transistor platforms for efficient electropolymerization of thiophene based oligomers

Abstract

Organic electrochemical transistors (OECTs) have emerged as promising candidates for various fields, including bioelectronics, neuromorphic computing, biosensors, and wearable electronics. OECTs operate in aqueous solutions, exhibit high amplification properties, and offer ion-to-electron signal transduction. The OECT channel consists of a conducting polymer, with PEDOT:PSS receiving the most attention to date. While PEDOT:PSS is highly conductive, and benefits from optimized protocols using secondary dopants and detergents, new p-type and n-type polymers are emerging with desirable material properties. Among these, low-oxidation potential oligomers are highly enabling for bioelectronics applications, however the polymers resulting from their polymerization lag far behind in conductivity compared with the established PEDOT:PSS. In this work we show that by careful design of the OECT geometrical characteristics, we can overcome this limitation and achieve devices that are on-par with transistors employing PEDOT:PSS. We demonstrate that the vertical architecture allows for facile electropolymerization of a family of trimers that are polymerized in very low oxidation potentials, without the need for harsh chemicals or secondary dopants. Vertical and planar OECTs are compared using various characterization methods. We show that vOECTs are superior platforms in general and propose that the vertical architecture can be expanded for the realization of OECTs for various applications.

Graphical abstract: Vertical organic electrochemical transistor platforms for efficient electropolymerization of thiophene based oligomers

Supplementary files

Article information

Article type
Communication
Submitted
21 Dec 2023
Accepted
23 Feb 2024
First published
04 Mar 2024
This article is Open Access
Creative Commons BY license

J. Mater. Chem. C, 2024,12, 5339-5346

Vertical organic electrochemical transistor platforms for efficient electropolymerization of thiophene based oligomers

M. Gryszel, D. Byun, B. Burtscher, T. Abrahamsson, J. Brodsky, D. T. Simon, M. Berggren, E. D. Glowacki, X. Strakosas and M. J. Donahue, J. Mater. Chem. C, 2024, 12, 5339 DOI: 10.1039/D3TC04730J

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