Researchers at the Chinese Academy of Sciences, University of Chinese Academy of Sciences, University of Science and Technology Beijing, Guangxi University and Beijing University of Technology have developed a dual-molecule surface passivation strategy that significantly improves both the efficiency and operational stability of wide-bandgap (WBG) perovskite solar cells. Wide-bandgap perovskites, typically incorporating ≥20% bromine in APb(I 1−x Br x )3, are essential for tandem solar cells but s