A deeper insight into the operation regime of all-polymeric electrochemical transistors

All-Organic Electrochemical Transistors (OECTs) realized by employing Poly(3,4-EthyleneDiOxy Thiophene) doped with Poly(Styrene Sulfonate) as conductive polymer show a dependence of their behavior on the gate to channel area ratio. This peculiarity has been investigated and the working mechanism has been explained in view of the behavior of the ionic component of the device. In particular, taking into account the current theory of OECT behavior, we have focused our attention on the role of the gate, trying to clarify if these devices may be considered as working in Faradaic or capacitive regime. (C) 2013 AIP Publishing LLC.