Materials aspects of PEDOT:PSS for neuromorphic organic electrochemical transistors

This article summarizes recent developments in organic mixed ion-electron conductors for organic electrochemical transistors (OECTs) in the field of materials science. Materials for the active layers, including crosslinkers and additives, are summarized, with a focus on poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS). Particular aspects of organic devices are highlighted, including their flexibility, biocompatibility, and facile fabrication processes.