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Numerical Modeling of an Organic Electrochemical Transistor

We develop a numerical model for the current-voltage characteristics of organic electrochemical transistors (OECTs) based on steady-state Poisson’s, Nernst’s and Nernst–Planck’s equations. The model starts with the doping–dedoping process depicted as a moving front, when the process at the electroly...

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Autores principales: Shirinskaya, Anna, Horowitz, Gilles, Rivnay, Jonathan, Malliaras, George G., Bonnassieux, Yvan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6316735/
https://www.ncbi.nlm.nih.gov/pubmed/30384434
http://dx.doi.org/10.3390/bios8040103
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author Shirinskaya, Anna
Horowitz, Gilles
Rivnay, Jonathan
Malliaras, George G.
Bonnassieux, Yvan
author_facet Shirinskaya, Anna
Horowitz, Gilles
Rivnay, Jonathan
Malliaras, George G.
Bonnassieux, Yvan
author_sort Shirinskaya, Anna
collection PubMed
description We develop a numerical model for the current-voltage characteristics of organic electrochemical transistors (OECTs) based on steady-state Poisson’s, Nernst’s and Nernst–Planck’s equations. The model starts with the doping–dedoping process depicted as a moving front, when the process at the electrolyte–polymer interface and gradually moves across the film. When the polymer reaches its final state, the electrical potential and charge density profiles largely depend on the way the cations behave during the process. One case is when cations are trapped at the polymer site where dedoping occurs. In this case, the moving front stops at a point that depends on the applied voltage; the higher the voltage, the closer the stopping point to the source electrode. Alternatively, when the cations are assumed to move freely in the polymer, the moving front eventually reaches the source electrode in all cases. In this second case, cations tend to accumulate near the source electrode, and most of the polymer is uniformly doped. The variation of the conductivity of the polymer film is then calculated by integrating the density of holes all over the film. Output and transfer curves of the OECT are obtained by integrating the gate voltage-dependent conductivity from source to drain.
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spelling pubmed-63167352019-01-09 Numerical Modeling of an Organic Electrochemical Transistor Shirinskaya, Anna Horowitz, Gilles Rivnay, Jonathan Malliaras, George G. Bonnassieux, Yvan Biosensors (Basel) Article We develop a numerical model for the current-voltage characteristics of organic electrochemical transistors (OECTs) based on steady-state Poisson’s, Nernst’s and Nernst–Planck’s equations. The model starts with the doping–dedoping process depicted as a moving front, when the process at the electrolyte–polymer interface and gradually moves across the film. When the polymer reaches its final state, the electrical potential and charge density profiles largely depend on the way the cations behave during the process. One case is when cations are trapped at the polymer site where dedoping occurs. In this case, the moving front stops at a point that depends on the applied voltage; the higher the voltage, the closer the stopping point to the source electrode. Alternatively, when the cations are assumed to move freely in the polymer, the moving front eventually reaches the source electrode in all cases. In this second case, cations tend to accumulate near the source electrode, and most of the polymer is uniformly doped. The variation of the conductivity of the polymer film is then calculated by integrating the density of holes all over the film. Output and transfer curves of the OECT are obtained by integrating the gate voltage-dependent conductivity from source to drain. MDPI 2018-10-31 /pmc/articles/PMC6316735/ /pubmed/30384434 http://dx.doi.org/10.3390/bios8040103 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Shirinskaya, Anna
Horowitz, Gilles
Rivnay, Jonathan
Malliaras, George G.
Bonnassieux, Yvan
Numerical Modeling of an Organic Electrochemical Transistor
title Numerical Modeling of an Organic Electrochemical Transistor
title_full Numerical Modeling of an Organic Electrochemical Transistor
title_fullStr Numerical Modeling of an Organic Electrochemical Transistor
title_full_unstemmed Numerical Modeling of an Organic Electrochemical Transistor
title_short Numerical Modeling of an Organic Electrochemical Transistor
title_sort numerical modeling of an organic electrochemical transistor
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6316735/
https://www.ncbi.nlm.nih.gov/pubmed/30384434
http://dx.doi.org/10.3390/bios8040103
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