biostudies-literatureUnknown16(1)Yang DThe perovskite/silicon tandem solar cells (TSCs) offers a state-of-the-art solution for achieving unparalleled efficiency and cost-effectiveness in solar energy conversion. However, the fabrication of high-quality wide-bandgap perovskite films with a thickness of 1 μm on nano-textured silicon substrates remains a formidable challenge. Herein, we designed an amphoteric coplanar conjugated molecule (ACCM) guided by the principles of density functional theory and Brønsted acid-base chemistry. The inductive effects among the functional groups within the ACCM allow it to exist in various ionic forms. Coupled with its intrinsic π-stacking effect, the ACCM establishes multiple strong interactions with perovskite components, effectively modulating crystallization kinetics and passivating defects. Nature communications7745https://www.ebi.ac.uk/biostudies/studies/S-EPMC12368124biostudies-literatureAmphoteric coplanar conjugated molecules enabling efficient and stable perovskite/silicon tandem solar cells.PMC12368124Tao KLiu SYang DDong QBao SWang JWang KYan ZRong STian WFahadi BJiang XZhang XJia XMa JDu MfalseAmphoteric coplanar conjugated molecules enabling efficient and stable perovskite/silicon tandem solar cells.The perovskite/silicon tandem solar cells (TSCs) offers a state-of-the-art solution for achieving unparalleled efficiency and cost-effectiveness in solar energy conversion. However, the fabrication of high-quality wide-bandgap perovskite films with a thickness of 1 μm on nano-textured silicon substrates remains a formidable challenge. Herein, we designed an amphoteric coplanar conjugated molecule (ACCM) guided by the principles of density functional theory and Brønsted acid-base chemistry. The inductive effects among the functional groups within the ACCM allow it to exist in various ionic forms. Coupled with its intrinsic π-stacking effect, the ACCM establishes multiple strong interactions with perovskite components, effectively modulating crystallization kinetics and passivating defects. 2025-01-01T00:00:00Z2025 Aug2026-05-05T19:04:06.966Z2026-04-07T21:51:12.679ZS-EPMC123681244083574510.1038/s41467-025-62700-2