Wang Kongxiang, Liu Hong, Huang Qi, Duan Zhongtao, Wang Jing, Zhao Chenxu, Lian Xinxin, Liu Ruochen, Su Yu, Guan Xiang, Zhang Yan, Lv Wenru, Zhou Haiting, Huang Guoping, Shen Yi, Zhang Hong, Xie Fengxian
Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, P.R. China.
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, Beijing Key Laboratory of Energy Safety and Clean Utilization, North China Electric Power University, Beijing 102206, P.R. China.
ACS Appl Mater Interfaces. 2024 Sep 25;16(38):50972-50981. doi: 10.1021/acsami.4c12647. Epub 2024 Sep 12.
The crystallization and growth of perovskite crystals are two crucial factors influencing the performance of perovskite solar cells (PSCs). Moreover, iodoplumbate complexes such as PbI, PbI, and PbI in perovskite precursor solution dictate both the quality of perovskite crystals and the optoelectrical performance of PSCs. Here, we propose an iodoplumbate-coordination strategy that employs pentafluorophenylsulfonyl chloride (PTFC) as an additive to tailor the crystal quality. This strategy directly affects the thermodynamics and kinetics of perovskite crystal formation by regulating hydrogen bonds or coordination bonds with Pb or I ions. Subsequently, the synergistic effect of the PTFC and FA complex was beneficial for intermediate-to-perovskite phase transition, improving the crystalline quality and reducing the defect density in the perovskite film to suppress nonradiative recombination loss. Consequently, the treated PSCs achieved a power conversion efficiency (PCE) of 24.61%, demonstrating enhanced long-term stability under both light and thermal stress. The developed device retained 92.53% of its initial PCE after 1200 h of continuous illumination and 88.6% of its initial PCE after 600 h of 85 °C thermal stability tests, respectively, both conducted in N atmospheres.
钙钛矿晶体的结晶和生长是影响钙钛矿太阳能电池（PSC）性能的两个关键因素。此外，钙钛矿前驱体溶液中的碘铅酸盐配合物，如PbI、PbI和PbI，决定了钙钛矿晶体的质量以及PSC的光电性能。在此，我们提出一种碘铅酸盐配位策略，该策略采用五氟苯磺酰氯（PTFC）作为添加剂来调整晶体质量。这种策略通过调节与Pb或I离子的氢键或配位键，直接影响钙钛矿晶体形成的热力学和动力学。随后，PTFC与FA配合物的协同效应有利于中间相到钙钛矿相的转变，提高了晶体质量并降低了钙钛矿薄膜中的缺陷密度，从而抑制非辐射复合损失。因此，经过处理的PSC实现了24.61%的功率转换效率（PCE），在光照和热应力下均表现出增强的长期稳定性。在N气氛中分别进行1200小时连续光照和600小时85°C热稳定性测试后，所开发的器件分别保留了其初始PCE的92.53%和88.6%。
