PbBr-based layered perovskite organic-inorganic superlattice having hole-transporting carbazole chromophore in organic layer

Oriented thin lms of lead bromide-based layered perovskite having an organicinorganic superlattice structure, which iscombined with a lead bromide semiconductor layer and an organic layer of carbazole-linked ammonium molecules, were suc-cessfully prepared by spin-coating from dimethylformamide solution in which stoichiometric amounts of PbBr2 and carbazole-linked ammonium bromides were dissolved. The thin lms exhibited sharp exciton absorption around 400 nm which is characteristicof PbBr-based layered perovskite in addition to absorptions due to carbazole chromophore peaking around 350 and 300 nm. X-raydiraction measurement demonstrated that the layer structure was oriented parallel to the lm plane: the spin-coated lms exhibitedonly (00n) reections, wherec-axis is in the stacking direction of the layer structure. KCI Citation Count: 12