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The non-ideal organic electrochemical transistors impedance

Pecqueur, Sébastien; Lončarić, Ivor; Zlatić, Vinko; Vuillaume, Dominique; Crljen, Željko (2019) The non-ideal organic electrochemical transistors impedance. Organic Electronics, 71 . pp. 14-23. ISSN 1566-1199

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Abstract

Organic electrochemical transistors offer powerful functionalities for biosensors and neuro-inspired electronics, with still much to understand on the time-dependent behavior of this electrochemical device. Here, we report on distributed-element modeling of the impedance of such micro-fabricated device, systematically performed under a large concentration variation for KCl(aq) and CaCl2(aq). We propose a new model which takes into account three main deviations to ideality, that were systematically observed, caused by both the materials and the device complexity, over large frequency range (1 Hz– 1 MHz). More than introducing more freedom degree, the introduction of these non-redundant parameters and the study of their behaviors as function of the electrolyte concentration and applied voltage give a more detailed picture of the OECT working principles. This optimized model can be further useful for improving OECT performances in many applications (e.g. biosensors, neuro-inspired devices, …) and circuit simulations.

Item Type: Article
Additional Information: We acknowledge financial supports from the EU: H2020 FET-OPEN project RECORD-IT (#GA 664786) and in part (RBI) by the H2020 CSA Twinning project No. 692194, RBI-T-WINNING and the European Union through the European Regional Development Fund - the Competitiveness and Cohesion Operational Programme (KK.01.1.1.06). We thank the French National Nanofabrication Network RENATECH for financial support of the IEMN clean-room.
Uncontrolled Keywords: Modeling ; Equivalent circuit ; Ion sensing
Subjects: NATURAL SCIENCES > Physics
NATURAL SCIENCES > Physics > Condensed Matter Physics
NATURAL SCIENCES > Chemistry > Physical Chemistry
Divisions: Theoretical Physics Division
Projects:
Project titleProject leaderProject codeProject type
Ruđer Bošković Institute: Twinning for a step forward of the Theoretical Physics Division-RBI-T-WINNINGFabrizio NESTI692194EK
Reservoir Computing with Real-time Data for future IT-RECORD-ITUNSPECIFIED664786EK
Depositing User: Vinko Zlatić
Date Deposited: 29 Apr 2020 12:36
Last Modified: 29 Apr 2020 12:36
URI: http://fulir.irb.hr/id/eprint/5466
DOI: 10.1016/j.orgel.2019.05.001

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