Organic electrochemical transistors (OECTs) are a promising alternative towards next-gen bioinspired circuitry, such as neuromorphic computers. The redox potential of OECTs offer a large range in nonvolatile linear conductance states at low gate switching voltages. In the case of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), the p-type PEDOT allows mobile holes to hop from one chain to another where, in the neutral form, these holes are compensated by PSS anions. Major limitations of PEDOT:PSS devices are due to the inherent nature of the material to oxidize, which can impede the state retention and cycle stability of a device. In this effort, a partially reduced self-doped PEDOT (S-PEDOT) that is water-soluble is synthesized and fabricated into an all-solid-state device. Device architecture, resembling that of an electrolyte-gated nonvolatile redox-based battery, tunes the device’s conductance via electrochemical doping/un-doping achieved by means of voltage pulsing to the gate. S-PEDOT OECTs are implemented to perform arithmetic and simple mathematics, execute information processing as Boolean logic gates, display electrochromic behaviors, and can emulate essential artificial neuronal and synaptic plasticities for learning and memory behaviors.

Organic electrochemical transistor based on a self-doped PEDOT polymer with multiple functions: Arithmetic, Boolean logic, electrochromism, and neuromorphic computing

ACS Spring Meeting 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.