Dresden 2020 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 49: Poster Session II

CPP 49.34: Poster

Tuesday, March 17, 2020, 14:00–16:00, P1A

Recent advances in materials and modelling of organic electrochemical transistors — •Florian Günther, Renan Colucci, Henrique F. P. Barbosa, Germán Gómez, Priscila Cavassin, and Gregório C. Faria — Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, Brazil

Organic electrochemical transistors (OECTs) have been successfully used as a transducer in applications requiring conversion of ion fluxes to electronic current. To fully understand and optimize them, it is mandatory to develop in-depth theoretical predictions of experimental data that fits both modes of operation: depletion and accumulation. Moreover, it is imperative to count with a vast palette of semiconducting polymers that can be efficiently used as active layers in electrochemical devices. Here, we present a universal method and accompanying guidelines for fabricating OECTs using water-insoluble hydrophobic semiconducting polymers. By taking advantage of the interactions of semiconducting polymers in certain organic solvents and the formation of a stable liquid-liquid interface between such solvents and water, we fabricated accumulation mode OECTs with high transconductance and enhanced stability. Additionally, we present an extension of the well-known Bernard-Malliaras model for the steady-state response of OECTs to describe electrical responses of accumulation mode OECT. We have fit output-curves of accumulation mode OECT, fabricated with the universal method previously mentioned. In all cases we got good agreements between experimental data and theoretical fittings.