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Inorganic CsPbI3 perovskite with high chemical stability is attractive for efficient deep‐red perovskite light‐emitting diodes (PeLEDs) with high color purity. Compared to PeLEDs based on ex‐situ‐synthesized CsPbI3 nanocrystals/quantum dots suffering from low conductivity and efficiency droop under high current densities, in situ deposited 3D CsPbI3 films from precursor solutions can maintain high...
Defect‐triggered phase degradation is generally considered as the main issue that causes phase instability and limited device performance for CsPbI3 inorganic perovskites. Here, a defect compensation in CsPbI3 perovskite through crystal secondary growth of inorganic perovskites is demonstrated, and highly efficient inorganic photovoltaics are realized. This secondary growth is achieved by a solid‐state...
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