Improved stability of organic electrochemical transistor performance with a low swelling mixed conducting polymer: a comparative study with PEDOT:PSS

Organic electrochemical transistors (OECTs) are bioelectronic devices that are capable of tracking biological events with extremely high sensitivity. Despite promising advances in terms of steady state performance, stable long-term electrochemical characteristics in complex environments need to be achieved in order for OECTs to open the market of biosensing applications. This work demonstrates the electrochemical performance stability of OECTs with a low swelling mixed conductor, poly[3-(6-hydroxy)hexylthiophene] (P3HHT), soaked in an electrolyte for up to 40 days, and the influence of the nature of the electrolyte on device performance.