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Photoluminescence study: a) Time‐integrated spectra and b) time‐resolved PL decays (detected at 760 nm) for MAPbI3−xBrx perovskite coated on meso‐Al2O3 film with and without incorporating Au‐nanospheres@SiO2 (AR = 1) or Au@SiO2 NRs (AR = 3.8).
