Chang Xiaoming, Azmi Randi, Yang Tinghuan, Wu Nan, Jeong Sang Young, Xi Herui, Satrio Utomo Drajad, Vishal Badri, Isikgor Furkan H, Faber Hendrik, Ling Zhaoheng, He Mingjie, Marengo Marco, Dally Pia, Prasetio Adi, Yang Yu-Ying, Xiao Chuanxiao, Woo Han Young, Zhao Kui, Heeney Martin, De Wolf Stefaan, Tsetseris Leonidas, Anthopoulos Thomas D
KAUST Solar Center (KSC), Physical and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, Kingdom of Saudi Arabia.
School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong, China.
Nat Commun. 2025 Jan 26;16(1):1042. doi: 10.1038/s41467-025-56409-5.
The controlled growth of two-dimensional (2D) perovskite atop three-dimensional (3D) perovskite films reduces interfacial recombination and impedes ion migration, thus improving the performance and stability of perovskite solar cells (PSCs). Unfortunately, the random orientation of the spontaneously formed 2D phase atop the pre-deposited 3D perovskite film can deteriorate charge extraction owing to energetic disorder, limiting the maximum attainable efficiency and long-term stability of the PSCs. Here, we introduce a meta-amidinopyridine ligand and the solvent post-dripping step to generate a highly ordered 2D perovskite phase on the surface of a 3D perovskite film. The reconstructed 2D/3D perovskite interface exhibits reduced energetic disorder and yields cells with improved performance compared with control 2D/3D samples. PSCs fabricated with the meta-amidinopyridine-induced phase-pure 2D perovskite passivation show a maximum power conversion efficiency of 26.05% (a certified value of 25.44%). Under damp heat and outdoor tests, the encapsulated PSCs maintain 82% and 75% of their initial PCE after 1000 h and 840 h, respectively, demonstrating improved practical durability.
在三维（3D）钙钛矿薄膜上可控生长二维（2D）钙钛矿可减少界面复合并阻碍离子迁移，从而提高钙钛矿太阳能电池（PSC）的性能和稳定性。不幸的是，在预先沉积的3D钙钛矿薄膜上自发形成的2D相的随机取向会由于能量无序而恶化电荷提取，限制了PSC可达到的最大效率和长期稳定性。在此，我们引入一种间脒基吡啶配体和溶剂后滴加步骤，以在3D钙钛矿薄膜表面生成高度有序的2D钙钛矿相。与对照2D/3D样品相比，重构的2D/3D钙钛矿界面表现出降低的能量无序，并产生性能改善的电池。用间脒基吡啶诱导的相纯2D钙钛矿钝化制备的PSC显示出最大功率转换效率为26.05%（认证值为25.44%）。在湿热和户外测试中，封装的PSC在1000小时和840小时后分别保持其初始PCE的82%和75%，证明了实际耐久性的提高。
