Reconfiguration of organic electrochemical transistors for high-accuracy potentiometric sensing

Luca Salvigni, Prem Depan Nayak, Anil Koklu, Danilo Arcangeli, Johana Uribe, Adel Hama, Raphaela Silva, Tania Cecilia Hidalgo Castillo, Sophie Griggs, Adam Marks, Iain McCulloch, Sahika Inal

Research output: Contribution to journalArticlepeer-review

Abstract

Organic electrochemical transistors have emerged as a promising alternative to traditional 2/3 electrode setups for sensing applications, offering in-situ transduction, electrochemical amplification, and noise reduction. Several of these devices are designed to detect potentiometric-derived signals. However, potentiometric sensing should be performed under open circuit potential conditions, allowing the system to reach thermodynamic equilibrium. This criterion is not met by conventional organic electrochemical transistors, where voltages or currents are directly applied to the sensing interface, that is, the gate electrode. In this work, we introduce an organic electrochemical transistor sensing configuration called the potentiometric‑OECT (pOECT), which maintains the sensing electrode under open circuit potential conditions. The pOECT exhibits a higher response than the 2-electrode setup and offers greater accuracy, response, and stability compared to conventional organic electrochemical transistors. Additionally, it allows for the implementation of high-impedance electrodes as gate/sensing surfaces, all without compromising the overall device size.

Original languageEnglish (US)
Article number6499
JournalNature communications
Volume15
Issue number1
DOIs
StatePublished - Dec 2024
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Biochemistry, Genetics and Molecular Biology
  • General Physics and Astronomy

Fingerprint

Dive into the research topics of 'Reconfiguration of organic electrochemical transistors for high-accuracy potentiometric sensing'. Together they form a unique fingerprint.

Cite this