Thiocyanate Ionic Liquids for High-Performance Ultra-Wide-Bandgap Perovskite Solar Cells.
Ultra-wide-bandgap (UWBG) perovskite solar cells are critical for constructing high-efficiency multi-junction tandem devices, yet their performance is constrained by severe nonradiative recombination and disorder in phase growth arising from high bromine content. Here, we report a rational anion-cation pairing strategy...