Perovskite solar cells (PSCs) have attracted much attention due to their high efficiency and low manufacturing cost. However, the defects in perovskite films and the instability issue caused by ion migration limit the further improvement of its efficiency and stability. Graphene and its derivatives are potential materials to solve these problems due to their rich functional groups, environmental stability and compactness, which triggered extensive researches in recent years. In this paper, the development and preparation methods of graphene materials are summarized and then their applications in PSCs are reviewed, with particular emphasis on their function of blocking ion migration.

中文翻译：

---

石墨烯衍生物在钙钛矿太阳能电池中的应用

钙钛矿太阳能电池（PSC）由于其高效率和低制造成本而备受关注。然而，钙钛矿薄膜的缺陷和离子迁移引起的不稳定性问题限制了其效率和稳定性的进一步提高。石墨烯及其衍生物由于其丰富的官能团，环境稳定性和致密性而成为解决这些问题的潜在材料，近年来引发了广泛的研究。本文概述了石墨烯材料的开发和制备方法，然后综述了它们在PSC中的应用，特别是它们在阻止离子迁移方面的作用。