Thiocyanate Ionic Liquids for High-Performance Ultra-Wide-Bandgap Perovskite Solar Cells

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21 Oct 2026 0 comments

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 using thiocyanate-based ionic liquids to simultaneously modulate crystallization kinetics and passivate multidimensional defects in 1.93 eV UWBG perovskites. By co-introducing...