Effect of channel thickness on noise in organic electrochemical transistors

Anastasios G. Polyravas, Nathan Schaefer, Vincenzo F. Curto, Andrea Bonaccini Calia, Anton Guimera-Brunet, Jose A. Garrido, George G. Malliaras

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Organic electrochemical transistors (OECTs) have been widely used as transducers in electrophysiology and other biosensing applications. Their identifying characteristic is a transconductance that increases with channel thickness, and this provides a facile mechanism to achieve high signal amplification. However, little is known about their noise behavior. Here, we investigate noise and extract metrics for the signal-to-noise ratio and limit of detection in OECTs with different channel thicknesses. These metrics are shown to improve as the channel thickness increases, demonstrating that OECTs can be easily optimized to show not only high amplification, but also low noise.
Original languageEnglish (US)
Pages (from-to)073302
JournalApplied Physics Letters
Issue number7
StatePublished - Aug 17 2020
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2021-02-16
Acknowledged KAUST grant number(s): OSR-2016-CRG5-3003
Acknowledgements: This work was funded by the European Union's Horizon 2020 research and innovation programme under Grant Agreement No. 732032 (BrainCom) the King Abdullah University of Science and Technology (KAUST) Office of sponsored Research (OSR) under Award No. OSR-2016-CRG5-3003. Authors also acknowledge funding from the 2DTecBio (FIS2017-85787-R) funded by the Spanish Ministry of Science, Innovation and Universities, the State Research Agency (AEI), and the European Regional Development Fund. Thanks are due to Elise Jenkins for help with the model.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.


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