Multifaceted Reductant for Buried Interface Modification of Tin‐Based Perovskite Solar Cells by Concurrently Suppressing Sn‐Oxidation and Facilitating Energy‐Alignment. - Ma, Yuanchen; Wu, Jiakun; Wu, Zhiyuan; Mahyuddin, Muhammad Haris; Liang, Ziqi (Advanced Functional Materials, 2026)