Chen et al. report a tailored self-assembled monolayer to create a localized 2D/3D perovskite heterojunction. This strategy reduces interfacial loss, achieving photovoltages >90% of thermodynamic limit for wide-bandgap cells, and enables perovskite-organic tandem solar cells with efficiency of 27.11%.
- Mingqian Chen
- Wenlin Jiang
- Alex K.-Y. Jen
