View article

Semiconducting polymers with oligoethylene glycol (OEG) sidechains have attracted strong research interest for organic electrochemical transistor (OECT) applications. However, key molecular design rules for high‐performance OECTs via efficient mixed electronic/ionic charge transport are still unclear. In this work, new glycolated copolymers (gDPP‐TTT and gDPP‐TTVTT) with diketopyrrolopyrrole (DPP) acceptor and thiophene (T) and vinylene (V) thiophene‐based donor units are synthesized and characterized for accumulation mode OECTs, where a long‐alkyl‐group (C₁₂) attached to the DPP unit acts as a spacer distancing the OEG groups from the polymer backbone. gDPP‐TTVTT shows the highest OECT transconductance (61.9 S cm^–1) and high operational stability, compared to gDPP‐TTT and their alkylated counterparts. Surprisingly, gDPP‐TTVTT also shows high electronic charge mobility in a field …