Jiao Shuo, Wang Tao, Zhou Zhongmin
College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
ChemSusChem. 2025 Jul 1;18(13):e202500333. doi: 10.1002/cssc.202500333. Epub 2025 May 4.
Inorganic hybrid tin-lead mixed perovskite solar cells (Sn-Pb PSCs) have attracted widespread attention in virtues of adjustable/narrow bandgaps, low toxicity, and application prospects in all-perovskite tandem solar cells, and the recorded power conversion efficiency (PCE) has reached 24.1%. However, the easy oxidation of Sn brings about abundant Sn vacancies and high concentrations of p-type self-doping, leading to the efficiency and durability of Sn-Pb PSCs still lagging behind those of Pb-based counterparts. To inhibit the oxidation of Sn, feasible additive engineering is proposed and shows impressive effects. Herein, the recent research progress about additive engineering for Pb-Sn PSCs in depth is discussed and reviewed. The additive molecules are classified into antioxidant additives, reducing additives, and competitive additives, according to different action objects, namely Sn, Sn, and oxygen. Meanwhile, the corresponding functional groups, antioxidant properties, the effect on optoelectronic performances of the device, as well as underlying mechanisms are systematically summarized. Finally, an outlook is provided for future directions in additive engineering toward the suppression of Sn oxidation in Sn-Pb perovskites.
无机杂化锡铅混合钙钛矿太阳能电池（Sn-Pb PSCs）因其可调/窄带隙、低毒性以及在全钙钛矿串联太阳能电池中的应用前景而受到广泛关注，其记录的功率转换效率（PCE）已达到24.1%。然而，Sn的易氧化导致大量Sn空位和高浓度的p型自掺杂，使得Sn-Pb PSCs的效率和耐久性仍落后于基于Pb的同类产品。为了抑制Sn的氧化，提出了可行的添加剂工程并显示出令人印象深刻的效果。在此，深入讨论和综述了关于Pb-Sn PSCs添加剂工程的最新研究进展。根据不同的作用对象，即Sn、Sn和氧，将添加剂分子分为抗氧化添加剂、还原添加剂和竞争添加剂。同时，系统总结了相应的官能团、抗氧化性能、对器件光电性能的影响以及潜在机制。最后，对添加剂工程在抑制Sn-Pb钙钛矿中Sn氧化方面的未来方向进行了展望。
