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Metal halide double perovskites (DPs) are being explored as stable and non-toxic alternatives of Pb-halide perovskites. Typically DPs exhibit a wide (>2.5 eV) and/or indirect bandgap, limiting their applications in the visible region. Here we impart the visible-light emission property in direct bandgap Cs2AgInCl6 DPs by doping Mn2+ ions. Synthesis, characterization and luminescence of metal halide double perovskites are reported.
K. et al. (2018) studied this question.