Fig. 1: Thermodynamic vs classic model of the OECT capacitance. | Nature Communications

Fig. 1: Thermodynamic vs classic model of the OECT capacitance.

From: Thermodynamics of organic electrochemical transistors

Fig. 1

a Typical setup for the IV measurement of an OECT using a non-polarizable Ag/AgCl pellet as a gate electrode. Such setup is used throughout this work too. b Redox reaction driving the operation of OECTs. The amount of oxidized and reduced PEDOT leads to the transfer curve sketched below. c Key difference between the FET-based model for OECTs and our thermodynamic model: the nonlinear charge accumulation resulting from the Gibbs free energy, in strong contrast with a linear accumulation typical of a capacitor.

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