Dithienonaphthobisthiadiazole synthesized by thienannulation of electron-deficient rings: an acceptor building unit for high-performance π-conjugated polymers

Dithienonaphthobisthiadiazole is developed as a new thiophene-fused acceptor building unit for π-conjugated polymers. The polymers demonstrate high transistor mobilities of >1 cm 2 V −1 s −1 and photovoltaic performance with efficiencies of >17%.