The photovoltaic performance of organic photovoltaic (OPV) cells can be significantly improved by regulating the aggregation structure and film formation kinetics of the constituent materials. However, many regulation strategies, including the use of additives and annealing, require complex fabrication processes and additional investments, which poses challenges for the industrialization of OPV cells. In this work, a completely fused non‐fullerene acceptor, GS‐20 is designed and synthesized, with strong aggregation properties. The incorporation of GS‐20 as a third component into the PBQx‐TF:eC9‐2Cl‐based cell accelerates aggregation of eC9‐2Cl and improves molecular stacking by promoting film deposition. The as‐cast ternary OPV cells fabricated without any post‐treatments exhibited a high VOC of 0.890 V and a maximum PCE of 19.0%. Moreover, a postprocessing‐free OPV module is fabricated using the blade coating method and obtains a satisfactory PCE of 13.5%, indicating excellent feasibility for large‐scale preparation. This work realizes an efficient postprocessing‐free OPV cell through molecular design and ternary strategy, facilitating the industrialization of OPV technology.

中文翻译：

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完全熔融的非富勒烯受体可实现高效的无后处理有机光伏电池


通过调节组成材料的聚集结构和成膜动力学，可以显著提高有机光伏 （OPV） 电池的光伏性能。然而，许多调节策略，包括添加剂的使用和退火，需要复杂的制造工艺和额外的投资，这给 OPV 电池的工业化带来了挑战。在这项工作中，设计并合成了一种完全融合的非富勒烯受体 GS-20，具有很强的聚集特性。将 GS-20 作为第三组分掺入基于 PBQx-TF：eC9-2Cl 的细胞中，加速了 eC9-2Cl 的聚集，并通过促进薄膜沉积来改善分子堆积。未经任何后处理制备的铸态三元 OPV 电池表现出 0.890 V 的高 VOC 和 19.0% 的最大 PCE。此外，使用叶片涂层方法制造了无后处理的 OPV 模块，并获得了令人满意的 13.5% 的 PCE，表明具有很好的大规模制备可行性。这项工作通过分子设计和三元策略实现了高效的无后处理 OPV 细胞，促进了 OPV 技术的产业化。