Johnpaul Kurisinkal Pious,Huagui Lai,Juntao Hu,Deying Luo,Evgeniia Gilshtein,Severin Siegrist,Radha K. Kothandaraman,Zheng‐Hong Lu,Christian Wolff,Ayodhya N. Tiwari,Fan Fu
High-efficiency Pb-Sn narrow-bandgap perovskite solar cells (PSCs) heavily rely on PEDOT:PSS as the hole-transport layer (HTL) owing to its excellent electrical conductivity, dopant-free nature, and facile solution processability. However, the shallow work function (