Li Bo, Pu Wei, Zhang Meng, Liu Yang, Li Mengjie
College of Materials and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055, China.
China Huaneng Clean Energy Research Institute, Beijing, 102218, China.
Small. 2024 Dec 4:e2407186. doi: 10.1002/smll.202407186.
Perovskite solar cells (PSCs) have seen rapid advancements over the past decade, driven by their exceptional optoelectronic properties and high power conversion efficiencies. Cl-based additives strategy has significantly contributed to these advancements by enhancing crystallinity, improving preferred orientation, and optimizing the surface morphology of perovskite films. This review provides a comprehensive summary of recent advancements and insights into the critical role of Cl-based additives in perovskite photovoltaics, focusing on the mechanisms behind Cl incorporation and its effects on film and device performance. First, the impact of Cl on precursor solution coordination and colloidal characteristics is discussed. Then, how Cl-based additives influence the phase transitions of perovskites, including methylammonium lead iodide (MAPbI), formamidinium lead iodide (FAPbI), and 2D perovskites is examined. Furthermore, the impact of Cl-based interfacial treatments on perovskite film quality is explored. Based on these insights, the overall impact of Cl treatments is also reviewed on the properties of perovskite films. Finally, a brief overview of the remaining challenges and future perspectives are provided to guide ongoing research efforts toward optimizing Cl additive engineering for high-performance PSCs.
在过去十年中，钙钛矿太阳能电池（PSC）取得了快速进展，这得益于其卓越的光电特性和高功率转换效率。基于氯的添加剂策略通过提高结晶度、改善择优取向以及优化钙钛矿薄膜的表面形态，为这些进展做出了重大贡献。本综述全面总结了基于氯的添加剂在钙钛矿光伏领域的最新进展和关键作用，重点关注氯掺入的机制及其对薄膜和器件性能的影响。首先，讨论了氯对前驱体溶液配位和胶体特性的影响。然后，研究了基于氯的添加剂如何影响钙钛矿的相变，包括甲基碘化铅铵（MAPbI）、甲脒碘化铅（FAPbI）和二维钙钛矿。此外，还探讨了基于氯的界面处理对钙钛矿薄膜质量的影响。基于这些见解，还综述了氯处理对钙钛矿薄膜性能的总体影响。最后，简要概述了剩余的挑战和未来展望，以指导正在进行的研究工作，朝着优化用于高性能PSC的氯添加剂工程方向发展。
