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In article number 2000270, Alberto Salleo, Yoeri van de Burgt, and co‐workers add small‐molecule amines to PEDOT:PSS in solution to fabricate high‐performance enhancement‐mode organic electrochemical transistors. Small‐molecule amines efficiently de‐dope PEDOT:PSS, shifting the transistor operation from depletion to enhancement mode without degrading the device performance. The effects of the de‐dopant...
Organic electrochemical transistors (OECTs) show great promise for flexible, low‐cost, and low‐voltage sensors for aqueous solutions. The majority of OECT devices are made using the polymer blend poly(ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), in which PEDOT is intrinsically doped due to inclusion of PSS. Because of this intrinsic doping, PEDOT:PSS OECTs generally operate in depletion...
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