Electrochemical Doping in Ordered and Disordered Domains of Organic Mixed Ionic–Electronic Conductors (Adv. Mater. 35/2023)

Organic Electrochemical Transistors In article number 2300308, Natalie Banerji and co-workers present an organic electrochemical transistor (OECT) based on a conjugated polymer film. Switching on the transistor leads to oxidation of the polymer, forming polarons and bipolarons. The charges are compensated by ions that enter the film from the electrolyte. Using time-resolved spectroelectrochemistry, they show that polarons prefer the ordered regions of the film, while bipolarons are generated in the amorphous regions.