In Situ Formation of Guanidinium Derivative and 2D/3D Heterostructure for 26.49% Efficient and Stable Inverted Perovskite Solar Cells. - Wang, Yifan; Sun, Rui; Li, Yongzhe; Cai, Yan; Liu, Longyuan; Xu, Yuan; Xu, Dongfang; Sun, Yiqiao; Wang, Hanye; Liu, Yulin; Lei, Hongjie; Li, Yong; et al. (Angewandte Chemie, 2026)