We report a new p-type semiconducting polymer family based on the thieno [3, 4-c] pyrrole- 4, 6-dione (TPD) building block, which exhibits good processability as well as good mobility and lifetime stability in thin-film transistors (TFTs). TPD homopolymer P1 was synthesized via Yamamoto coupling, whereas copolymers P2–P8 were synthesized via Stille coupling. All of these polymers were characterized by chemical analysis as well as thermal analysis, ...