Minimizing buried interfacial defects for efficient inverted perovskite solar cells

• DOI: 10.1126/science.adg3755
• Publication Date: 2023-04-27T17:59:00Z
• Authors: Shuo Zhang; Fangyuan Ye; Xiaoyu Wang; Rui Chen; Huidong Zhang; Liqing Zhan; Xianyuan Jiang; Yawen Li; Xiaoyu Ji; Shuaijun Liu; Miaojie Yu; Furong Yu; Yilin Zhang; Ruihan Wu; Zonghao Liu; Zhijun Ning; Dieter Neher; Liyuan Han; Yuze Lin; He Tian; Wei Chen; Martin Stolterfoht; Lijun Zhang; Wei-Hong Zhu; Yongzhen Wu
• Keywords: Microsecond

Controlling the perovskite morphology and defects at buried perovskite-substrate interface is challenging for inverted solar cells. In this work, we report an amphiphilic molecular hole transporter, (2-(4-(bis(4-methoxyphenyl)amino)phenyl)-1-cyanovinyl)phosphonic acid, that features a multifunctional cyanovinyl phosphonic acid group forms superwetting underlayer deposition, which enables high-quality films with minimized interface. The resulting film has photoluminescence quantum yield of 17% Shockley-Read-Hall lifetime nearly 7 microseconds achieved certified power conversion efficiency (PCE) 25.4% open-circuit voltage 1.21 volts fill factor 84.7%. addition, 1-square centimeter cells 10-square minimodules show PCEs 23.4 22.0%, respectively. Encapsulated modules exhibited high stability under both operational damp heat test conditions.