Synergetic effect of the surface ligand and SiO₂ driven photoluminescence stabilization of the CH₃NH₃PbBr₃ perovskite magic-sized clusters.

ABSTRACT: Zero-dimensional Perovskite Magic-size Clusters play crucial roles in understanding and controlling nucleation and growth of semiconductor nanoparticles. However, their metastability behavior is a critical hindrance for reliable characterizations. Here, we report the first demonstration of using an excess amount of surface ligand and SiO₂ as novel passivation for synthesizing the magic-sized clusters (MSCs) by the Ligand-assisted reprecipitation method. A synergetic effect between an excessed surface ligand and SiO₂ inhibits the protonation and deprotonation reaction between amine-based and acid-based ligand, leading to enhanced PL stability. The obtained CH₃NH₃PbBr₃ PMSCs/SiO₂ retain 70% of its initial emission intensity in ambient conditions for 20 days. This passivation approach opens an entirely new avenue for the reliable characterizations of CH₃NH₃PbBr₃ PMSCs, which will significantly broaden their application for understanding and controlling nucleation and growth of semiconductor nanoparticles.

SUBMITTER: Permatasari FA 

PROVIDER: S-EPMC8593060 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature