Zhang Weifu, Liu Jian, Song Wei, Shan Jiahong, Guan Haowei, Zhou Jun, Meng Yuanyuan, Tong Xinyu, Zhu Jintao, Yang Mengjin, Ge Ziyi
Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
Sci Adv. 2025 Jan 31;11(5):eadr2290. doi: 10.1126/sciadv.adr2290.
Flexible perovskite solar cells (f-PSCs) are considered the most promising candidates in portable power applications. However, high sensitivity of crystallization on the substrate and the intrinsic brittleness usually trade off the performance of f-PSCs. Herein, we introduced an initiator-free cross-linkable monomer (2,5-dioxopyrrolidin-1-yl) 5-(dithiolan-3-yl)pentanoate (FTA), which can chemically passivate defects and enable real-time fine regulation of crystallization. The resulting perovskite film exhibited higher crystallinity, enlarged grain size, and reduced dependence on the substrate. In addition, the cross-linked FTA [CL(FTA)] distributed along the grain boundaries effectively released the residual stress and securely bound the grains together. Consequently, the CL(FTA)-modified flexible PSCs achieved a record-breaking efficiency of 24.64% (certified 24.08%). Moreover, the scalable potential has been verified by the corresponding rigid and flexible modules, delivering impressive efficiencies of 19.53 and 17.13%, respectively. Furthermore, the optimized device demonstrated bending durability and improved operational stability, thereby advancing the progress of f-PSCs toward industrialization.
柔性钙钛矿太阳能电池（f-PSC）被认为是便携式电源应用中最有前景的候选者。然而，基底上结晶的高敏感性和固有的脆性通常会牺牲f-PSC的性能。在此，我们引入了一种无引发剂的可交联单体5-(二硫杂环戊烷-3-基)戊酸(2,5-二氧代吡咯烷-1-基)酯（FTA），它可以化学钝化缺陷并实现对结晶的实时精细调控。所得的钙钛矿薄膜表现出更高的结晶度、更大的晶粒尺寸以及对基底更低的依赖性。此外，沿晶界分布的交联FTA [CL(FTA)]有效地释放了残余应力并将晶粒牢固地结合在一起。因此，CL(FTA)修饰的柔性PSC实现了破纪录的24.64%的效率（认证效率为24.08%）。此外，相应的刚性和柔性模块验证了其可扩展性潜力，分别实现了令人印象深刻的19.53%和17.13%的效率。此外，优化后的器件展示出弯曲耐久性和改进的运行稳定性，从而推动了f-PSC向工业化迈进的进程。
