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A copolymerization strategy is developed to utilize porphyrin as a complementary light‐harvesting unit (LHU) in D–A polymers. For polymer solar cells (PSCs), the presence of LHUs increases the short‐circuit current density (Jsc) without sacrificing the open‐circuit voltage (Voc) and fill factor (FF). Up to 8.0% power conversion efficiency (PCE) is delivered by PPor‐2:PC71BM single‐junction PSCs. A...
A high organic field‐effect transistor mobility (0.29 cm2V−1s−1) and bulk‐heterojunction polymer solar cell performance (PCE of 6.82%) have been achieved in a low bandgap alternating copolymer consisting of axisymmetrical structural units, 5,6‐difluorobenzo‐2,1,3‐thiadiazole. Introducing the fluorine substituents enhanced intermolecular interaction and improved the solid‐state order, which consequently...
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