Lead (Pb)-free Tin (Sn)-based perovskite solar cells (PSCs) have been favored by the community due to their low toxicity, preferable bandgaps, and great potential to achieve high power conversion efficiencies (PCEs). Interfaces engineering plays important roles in developing highly efficient Sn-based PSCs via passivation of trap defects, alignment of energy levels, and incorporation of low-dimensional Sn-based perovskites. In this review, we summarize the development of Pb-free Sn-based perovskites and their applications in devices, especially the strategies of improving the interfaces. We also provide perspectives for future research. Our aim is to help the development of new and advanced approaches to achieving high-performance environment-friendly Pb-free Sn-based PSCs.

无铅（Pb）的锡（Sn）基钙钛矿太阳能电池（PSC）由于其低毒性，较好的带隙以及实现高功率转换效率（PCE）的巨大潜力而​​受到社区的青睐。界面工程在通过陷阱缺陷的钝化，能级的对准以及低维锡基钙钛矿的掺入方面，在开发高效的锡基PSC中起着重要作用。在这篇综述中，我们总结了无铅锡基钙钛矿的开发及其在设备中的应用，特别是改善界面的策略。我们还提供了未来研究的观点。我们的目标是帮助开发新的和先进的方法，以实现高性能，环境友好的无铅锡基PSC。