Zhao Chenxu, Zhou Zhiwen, Almalki Masaud, Hope Michael A, Zhao Jiashang, Gallet Thibaut, Krishna Anurag, Mishra Aditya, Eickemeyer Felix T, Xu Jia, Yang Yingguo, Zakeeruddin Shaik M, Redinger Alex, Savenije Tom J, Emsley Lyndon, Yao Jianxi, Zhang Hong, Grätzel Michael
Laboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
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, P. R. China.
Nat Commun. 2024 Aug 20;15(1):7139. doi: 10.1038/s41467-024-51550-z.
The presence of defects at the interface between the perovskite film and the carrier transport layer poses significant challenges to the performance and stability of perovskite solar cells (PSCs). Addressing this issue, we introduce a dual host-guest (DHG) complexation strategy to modulate both the bulk and interfacial properties of FAPbI-rich PSCs. Through NMR spectroscopy, a synergistic effect of the dual treatment is observed. Additionally, electro-optical characterizations demonstrate that the DHG strategy not only passivates defects but also enhances carrier extraction and transport. Remarkably, employing the DHG strategy yields PSCs with power conversion efficiencies (PCE) of 25.89% (certified at 25.53%). Furthermore, these DHG-modified PSCs exhibit enhanced operational stability, retaining over 96.6% of their initial PCE of 25.55% after 1050 hours of continuous operation under one-sun illumination, which was the highest initial value in the recently reported articles. This work establishes a promising pathway for stabilizing high-efficiency perovskite photovoltaics through supramolecular engineering, marking a significant advancement in the field.
钙钛矿薄膜与载流子传输层之间界面处存在的缺陷对钙钛矿太阳能电池（PSC）的性能和稳定性构成了重大挑战。为了解决这个问题，我们引入了一种双主客体（DHG）络合策略来调节富含FAPbI的PSC的体相和界面性质。通过核磁共振光谱，观察到了双重处理的协同效应。此外，电光表征表明，DHG策略不仅可以钝化缺陷，还可以增强载流子的提取和传输。值得注意的是，采用DHG策略制备的PSC的功率转换效率（PCE）达到了25.89%（认证值为25.53%）。此外，这些经过DHG修饰的PSC表现出增强的运行稳定性，在1050小时的单太阳光照连续运行后，仍保留其初始PCE 25.55%的96.6%以上，这是最近报道的文章中最高的初始值。这项工作通过超分子工程为稳定高效钙钛矿光伏建立了一条有前景的途径，标志着该领域的重大进展。
