8/28/2023 0 Comments Formation insight couleursThe relatively fast rearrangement of 2− n complexes followed by motion of MA cations limits the perovskite growth. Undercoordinated 2− n complexes are initially formed which create the 3D perovskite framework mediated by additional nucleophilic attacks. Our results show clear evidence of halide-driven chemistry: MAI iodine ions attack lead ions in the PbI 2 layers and cause a nucleophilic substitution of Pb–I bonds with a subsequent breaking of the PbI 2 layer.
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