In Situ Formation of Zwitterionic Ligands: Changing the Passivation Paradigms of CsPbBr₃ Nanocrystals.

ABSTRACT: CsPbBr₃ nanocrystals (NCs) passivated by conventional lipophilic capping ligands suffer from colloidal and optical instability under ambient conditions, commonly due to the surface rearrangements induced by the polar solvents used for the NC purification steps. To avoid onerous postsynthetic approaches, ascertained as the only viable stability-improvement strategy, the surface passivation paradigms of as-prepared CsPbBr₃ NCs should be revisited. In this work, the addition of an extra halide source (8-bromooctanoic acid) to the typical CsPbBr₃ synthesis precursors and surfactants leads to the in situ formation of a zwitterionic ligand already before cesium injection. As a result, CsPbBr₃ NCs become insoluble in nonpolar hexane, with which t

SUBMITTER: Grisorio R 

PROVIDER: S-EPMC9185741 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature