Xinxing Yin

Abstract Low-bandgap (Eg ~ 1.25 eV) tin–lead perovskite solar cells hold great potential for constructing efficient all-perovskite tandem solar cells (TSCs). However, rapid degradation of perovskite precursor solutions, owing to easy oxidation of Sn2+, remains a major challenge. Here we elucidate oxidation pathways in Sn–Pb perovskite precursors. We further introduce basic amino acids and basic amino acids sulfate (BAAS) as proton scavengers, which stabilize the ink for over 300 days.

Energy, Environmental, and Catalysis ApplicationsMay 4, 2026 Zhengming Ma College of Materials Science and Engineering & Institute of New Energy and Low-Carbon Technology & Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education, Sichuan University, Chengdu 610065, China Shenghan Wu College of Materials Science and Engineering & Institute of New Energy and Low-Carbon Technology & Engineering Research Center of Alternative Energy Materials & Devices,...

Abstract The broad bandgap tunability of both perovskites and organic semiconductors enables the development of perovskite–organic tandem solar cells with promising theoretical efficiency. However, the certified efficiencies of reported perovskite–organic tandem solar cells remain lower than those of single-junction perovskite solar cells, primarily because of insufficient near-infrared photocurrent in narrow-bandgap organic subcells1,2,3.