Transforming colloidal Cs₄PbBr₆ nanocrystals with poly(maleic anhydride-alt-1-octadecene) into stable CsPbBr₃ perovskite emitters through intermediate heterostructures.

ABSTRACT: The preparation of strongly emissive CsPbBr₃ perovskite nanocrystals with robust surface passivation is a challenge in the field of lead halide perovskite nanomaterials. We report an approach to prepare polymer-capped CsPbBr₃ perovskite nanocrystals by reacting oleylammonium/oleate-capped Cs₄PbBr₆ nanocrystals with poly(maleic anhydride-alt-1-octadecene) (PMAO). PMAO contains succinic anhydride units that are reactive towards the oleylamine species present on the Cs₄PbBr₆ nanocrystals' surface and produces polysuccinamic acid, which, in turn, triggers the Cs₄PbBr₆ to CsPbBr₃ conversion. The transformation occurs through the formation of Cs₄PbBr₆-CsPbBr₃

SUBMITTER: Baranov D 

PROVIDER: S-EPMC7116022 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature