Molecular engineering towards efficientwhite-light-emitting perovskite.

ABSTRACT: Low-dimensional hybrid perovskites have demonstrated excellent performance as white-light emitters. The broadband white emission originates from self-trapped excitons (STEs). Since the mechanism of STEs formation in perovskites is still not clear, preparing new low-dimensional white perovskites relies mostly on screening lots of intercalated organic molecules rather than rational design. Here, we report an atom-substituting strategy to trigger STEs formation in layered perovskites. Halogen-substituted phenyl molecules are applied to synthesize perovskite crystals. The halogen-substituents will withdraw electrons from the branched chain (-R-NH₃⁺) of the phenyl molecule. This will result in positive charge accumulation on -R-NH₃⁺, and thus stronger

SUBMITTER: Zhang M 

PROVIDER: S-EPMC8361204 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature