While great progress has been achieved in all-polymer solar cells (all-PSCs), the efficiency of all-PSCs is primarily limited by polymer acceptors that lack a high extinction coefficient, high electron mobility, and good compatibility with polymer donors. Here we designed and developed a polymer acceptor PFA1 based on a non-fullerene acceptor framework with a fluorine substituent on the 1,1-dicyanomethylene-3-indanone unit. In combination with an electron-donating polymer, PTzBI-oF, the blend film presents an extended and intensified absorption profile, enhanced electron mobility, and favorable film morphology. The optimized all-PSCs exhibit a remarkably high efficiency of 15.11%, which is, to the best of our knowledge, the highest performance yet reported for an all-PSC. Of particular importance is the applicability of PFA1 as a universal polymer acceptor with a range of polymer donors to achieve impressively high efficiencies. These properties enable a new molecular design strategy for the construction of polymer acceptors toward applications in high-performance all-PSCs.

中文翻译：

---

通用氟化聚合物受体使全聚合物太阳能电池的效率> 15％

尽管在全聚合物太阳能电池（all-PSC）中已取得了巨大的进步，但全PSC的效率主要受到缺乏高消光系数，高电子迁移率以及与聚合物供体的良好相容性的聚合物受体的限制。在这里，我们设计和开发了一种基于非富勒烯受体骨架的聚合物受体PFA1，该骨架在1,1-二氰亚甲基-3-茚满酮单元上带有氟取代基。与给电子体聚合物PTzBI-oF结合使用时，共混膜具有扩展和增强的吸收特性，增强的电子迁移率以及良好的膜形态。经过优化的全PSC表现出15.11％的极高效率，据我们所知，这是全PSC迄今报道的最高性能。特别重要的是，PFA1作为通用聚合物受体与一系列聚合物供体的适用性，可实现令人印象深刻的高效率。这些特性为构建面向高性能全PSC的聚合物受体的新分子设计策略提供了可能。