Zhuang Qixin, Xu Zhiyuan, Li Haiyun, Zhang Cong, Gong Cheng, Wang Huaxin, Li Xiong, Zang Zhigang
College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China.
Sci Adv. 2025 May 9;11(19):eado7318. doi: 10.1126/sciadv.ado7318. Epub 2025 May 7.
Lead leakage and stability are the main challenges for the commercialization of perovskite solar cells (PSCs). Here, we propose adding ,'-bis(acryloyl)cystamine (BAC) to the perovskite precursor solution, which facilitates the formation of polymer BAC (PBAC) at the grain boundaries during the annealing process of films. The PBAC can effectively passivate the defects and reduce the risk of lead leakage. Consequently, the PBAC-modified PSCs achieve an efficiency of 25.53% (0.1 square centimeters) (certified efficiency of 25.24%) and 24.03% (1.0 square centimeters). Moreover, after 1500 hours of continuous maximum power point tracking under simulated AM 1.5 illumination and 2000 hours of exposure to damp heat conditions (85°C and 85% relative humidity), the device retains approximately 96 and 81% of its initial power conversion efficiency, respectively. In addition, PBAC can effectively reduce lead leakage by nearly 72% by immersing the PSCs in water for 480 minutes.
铅泄漏和稳定性是钙钛矿太阳能电池（PSC）商业化的主要挑战。在此，我们提出在钙钛矿前驱体溶液中添加,'-双（丙烯酰基）胱胺（BAC），这有助于在薄膜退火过程中在晶界处形成聚合物BAC（PBAC）。PBAC可以有效钝化缺陷并降低铅泄漏风险。因此，PBAC修饰的PSC实现了25.53%（0.1平方厘米）的效率（认证效率为25.24%）和24.03%（1.0平方厘米）的效率。此外，在模拟AM 1.5光照下连续最大功率点跟踪1500小时以及在湿热条件（85°C和85%相对湿度）下暴露2000小时后，该器件分别保留了其初始功率转换效率的约96%和81%。此外，通过将PSC在水中浸泡480分钟，PBAC可以有效减少近72%的铅泄漏。
