In Situ Polymerization of Cross‐Linked Perovskite–Polymer Composites for Highly Stable and Efficient Perovskite Solar Cells

Mixed‐halide perovskites have emerged as outstanding light absorbers that enable the fabrication of efficient solar cells; however, their instability hinders the commercialization of such systems. Grain‐boundary (GB) defects and lattice tensile strain are critical intrinsic‐instability factors in po...

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