Perovskite solar cells (PSCs) offer low costs and high power conversion efficiency. However, the lack of long-term stability, primarily stemming from the interfacial defects and the susceptible metal electrodes, hinders their practical application. In the past few years, two-dimensional (2D) materials (e.g., graphene and its derivatives, transitional metal dichalcogenides, MXenes, and black phosphorus) have been identified as a promising solution to solving these problems because of their dangling bond-free surfaces, layer-dependent electronic band structures, tunable functional groups, and inherent compactness. Here, recent progress of 2D material toward efficient and stable PSCs is summarized, including its role as both interface materials and electrodes. We discuss their beneficial effects on perovskite growth, energy level alignment, defect passivation, as well as blocking external stimulus. In particular, the unique properties of 2D materials to form van der Waals heterojunction at the bottom interface are emphasized. Finally, perspectives on the further development of PSCs using 2D materials are provided, such as designing high-quality van der Waals heterojunction, enhancing the uniformity and coverage of 2D nanosheets, and developing new 2D materials-based electrodes.

钙钛矿太阳能电池（PSC）具有低成本和高功率转换效率。然而，主要由于界面缺陷和易受影响的金属电极而缺乏长期稳定性，阻碍了它们的实际应用。在过去的几年中，二维（2D）材料（例如石墨烯及其衍生物、过渡金属二硫属化物、MXenes和黑磷）因其悬空的无键表面而被认为是解决这些问题的有前途的解决方案、层相关电子能带结构、可调谐官能团和固有的紧凑性。本文总结了二维材料在高效稳定PSC方面的最新进展，包括其作为界面材料和电极的作用。我们讨论了它们对钙钛矿生长、能级排列、缺陷钝化以及阻止外部刺激的有益影响。特别强调了二维材料在底部界面形成范德华异质结的独特性能。最后，提出了使用二维材料进一步开发PSC的观点，例如设计高质量范德华异质结、增强二维纳米片的均匀性和覆盖率以及开发基于二维材料的新型电极。