Synthesis and charge carrier mobility of a solution-processable conjugated copolymer based on cyclopenta[c]thiophene

A new small bad gap copolymer based on cyclopenta[c]thiophene was synthesized. DFT calculations revealed that didodecyloxymethyl-3,4-cyclopentane substitution on alternate thiophene in a polythiophene system does not disturb the planarity of the resulting copolymer. The copolymer displays an effective hole mobility up to 1.4 × 10−2 cm2 V−1 s−1.