【摘 要】
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The development of organic photoactive materials,especially the newly emerging non-fuilerene electron acceptors (NFAs),has enabled rapid progress in organic pho
【机 构】
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State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sci
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The development of organic photoactive materials,especially the newly emerging non-fuilerene electron acceptors (NFAs),has enabled rapid progress in organic photovoltaic (OPV) cells in recent years.Although the power conversion efficiencies (PCEs) of the top-performance OPV cells have surpassed 16％,the devices are usually fabricated via a spin-coating method and are not suitable for large-area production.Here,we demonstrate that the fine-modification of the flexible side chains of NFAs can yield 17％ PCE for OPV cells.More crucially,as the optimal NFA has a suitable solubility and thus a desirable morphology,the high efficiencies of spin-coated devices can be maintained when using scalable blade-coating processing technology.Our results suggest that optimization of the chemical structures of the OPV materials can improve device performance.This has great significance in larger-area production technologies that provide important scientific insights for the commercialization of OPV cells.
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