The development of organic photoactive materials, especially the newly emerging non-fullerene 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.

中文翻译：

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具有 17% 效率和卓越加工性能的有机光伏电池

近年来，有机光敏材料，尤其是新兴的非富勒烯电子受体（NFAs）的发展，使有机光伏（OPV）电池取得了快速发展。尽管顶级OPV电池的功率转换效率（PCE）已经超过16%，但这些器件通常是通过旋涂方法制造的，不适合大面积生产。在这里，我们证明了 NFA 柔性侧链的精细修饰可以为 OPV 电池产生 17% 的 PCE。更重要的是，由于最佳 NFA 具有合适的溶解度，因此具有理想的形态，因此在使用可扩展的刮刀涂布加工技术时，可以保持旋涂设备的高效率。我们的结果表明，优化 OPV 材料的化学结构可以提高器件性能。这在大面积生产技术中具有重要意义，这些技术为 OPV 电池的商业化提供了重要的科学见解。