Large dimeric donors possess particular chemical buildings and regulatable molecular skeletons, and are anticipated to grow to be various photovoltaic supplies for polymer donor with batch variations. Nevertheless, the design of big dimeric donors remains to be at an early stage and must be additional explored. Right here, by inventive semi-flexible and versatile linkers design, we synthesized three attention-grabbing gaint dimeric donors with relative monomer positions starting from parallel to staircase to perpendicular of their optimized conformation. Unusually, resulted from the hyperconjugation impact within the semi-flexible linker, the much less planar the molecular spine, the stronger the homo-molecular interplay. Combining calculations and a number of morphology characterizations on dynamic and thermal packing, we systematically analyze the hyperconjugation results, flexibility, and hetero-molecular interplay on the meeting. Consequently, making use of Y6 as an acceptor, the enormous dimeric donor of BDT-Dimer3 with a semi-flexible non-planar linker carried out a passable effectivity of 15.68% with cutting-edge short-circuit present of 27.39 mA cm-2 and an improved photo-stability with T80 of 630 hours. Our outcomes present hyperconjugated linker design for environment friendly and steady OSCs gadgets with particular construction, in addition to a deep understanding of the meeting in each pure and blended programs.
