Tuning of the Stretchability and Charge Transport of Bis‐Diketopyrrolopyrrole and Carbazole‐Based Thermoplastic Soft Semiconductors by Modulating Soft Segment Contents

Abstract Polymer semiconductors are promising materials for stretchable, wearable, and implantable devices due to their intrinsic flexibility, facile functionalization, solution processability at low temperatures. However, the crystalline domain of conjugated structure high charge carrier mobility in semiconducting polymers exhibits lower stretchability than that semi‐crystalline or amorphous domains. Herein, a set thermoplastic soft is synthesized with different ratios diketopyrrolopyrrole–carbazole–diketopyrrolopyrrole (DPP‐Cz‐DPP)‐based hard segments thiophene‐based aliphatic segments, having similar elastomers. The exhibit decreased glassy temperatures increased content segments. show crystallinity after copolymerization large‐sized DPP‐Cz‐DPP core non‐conjugated an aggregation property core, still possessing annealing. polymer films under strains up 60%. Organic field‐effect transistors fabricated using stretchable range 0.125–0.005 cm 2 V −1 s proportions segment. improved significantly mobilities less when segment increased. Therefore, this study presents design principle development high‐performance polymer.