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Tuning the Organic Electrochemical Transistor (OECT) Threshold Voltage with Monomer Blends

Priyadarshini, Diana ; Li, Changbai ; Rilemark, Rebecka ; Abrahamsson, Tobias ; Donahue, Mary J. ; Strakosas, Xenofon LU ; Ek, Fredrik LU orcid ; Olsson, Roger LU orcid ; Musumeci, Chiara and Fabiano, Simone , et al. (2024) In Advanced Electronic Materials
Abstract

A novel approach is introduced to modulate the threshold voltage of organic electrochemical transistors (OECTs) that are fabricated by electropolymerizing the channel material between the source and drain electrodes. To achieve this, we adjust the ratio of two water-soluble tri-thiophene monomers, which share the same backbone, but present either anionic or zwitterionic sidechains, during channel formation. This approach allows for a continuous modulation of both the electropolymerization onset potential and the native doping state of the film. We attribute the effect of monomer blends displaying properties that are a weighted average of their components to the formation of nanoscale monomer aggregates that have a uniform internal... (More)

A novel approach is introduced to modulate the threshold voltage of organic electrochemical transistors (OECTs) that are fabricated by electropolymerizing the channel material between the source and drain electrodes. To achieve this, we adjust the ratio of two water-soluble tri-thiophene monomers, which share the same backbone, but present either anionic or zwitterionic sidechains, during channel formation. This approach allows for a continuous modulation of both the electropolymerization onset potential and the native doping state of the film. We attribute the effect of monomer blends displaying properties that are a weighted average of their components to the formation of nanoscale monomer aggregates that have a uniform internal charge density. Through an investigation of monomer aggregation behavior, polymer film growth, and device properties of OECTs fabricated by electropolymerization, we highlight the importance of monomer aggregation in the electropolymerization of conducting polymers. The ability to tune both electropolymerization onset and the OECT threshold voltage has significant implications for the development of more complex circuits for integrated neuromorphic computing, biosensing, and bioelectronic systems.

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organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
aggregation, conducting polymer, electropolymerization, organic electrochemical transistor (OECT), threshold voltage
in
Advanced Electronic Materials
article number
2400681
publisher
John Wiley & Sons Inc.
external identifiers
  • scopus:85209747672
ISSN
2199-160X
DOI
10.1002/aelm.202400681
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2024 The Author(s). Advanced Electronic Materials published by Wiley-VCH GmbH.
id
630112f2-6fb9-4048-a9fd-052a6415e081
date added to LUP
2025-01-07 12:55:39
date last changed
2025-06-25 02:10:07
@article{630112f2-6fb9-4048-a9fd-052a6415e081,
  abstract     = {{<p>A novel approach is introduced to modulate the threshold voltage of organic electrochemical transistors (OECTs) that are fabricated by electropolymerizing the channel material between the source and drain electrodes. To achieve this, we adjust the ratio of two water-soluble tri-thiophene monomers, which share the same backbone, but present either anionic or zwitterionic sidechains, during channel formation. This approach allows for a continuous modulation of both the electropolymerization onset potential and the native doping state of the film. We attribute the effect of monomer blends displaying properties that are a weighted average of their components to the formation of nanoscale monomer aggregates that have a uniform internal charge density. Through an investigation of monomer aggregation behavior, polymer film growth, and device properties of OECTs fabricated by electropolymerization, we highlight the importance of monomer aggregation in the electropolymerization of conducting polymers. The ability to tune both electropolymerization onset and the OECT threshold voltage has significant implications for the development of more complex circuits for integrated neuromorphic computing, biosensing, and bioelectronic systems.</p>}},
  author       = {{Priyadarshini, Diana and Li, Changbai and Rilemark, Rebecka and Abrahamsson, Tobias and Donahue, Mary J. and Strakosas, Xenofon and Ek, Fredrik and Olsson, Roger and Musumeci, Chiara and Fabiano, Simone and Berggren, Magnus and Olsson, Eva and Simon, Daniel T. and Gerasimov, Jennifer Y.}},
  issn         = {{2199-160X}},
  keywords     = {{aggregation; conducting polymer; electropolymerization; organic electrochemical transistor (OECT); threshold voltage}},
  language     = {{eng}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Advanced Electronic Materials}},
  title        = {{Tuning the Organic Electrochemical Transistor (OECT) Threshold Voltage with Monomer Blends}},
  url          = {{http://dx.doi.org/10.1002/aelm.202400681}},
  doi          = {{10.1002/aelm.202400681}},
  year         = {{2024}},
}