Alloy CsCd _x Pb_1-x Br₃ Perovskite Nanocrystals: The Role of Surface Passivation in Preserving Composition and Blue Emission.

ABSTRACT: Various strategies have been proposed to engineer the band gap of metal halide perovskite nanocrystals (NCs) while preserving their structure and composition and thus ensuring spectral stability of the emission color. An aspect that has only been marginally investigated is how the type of surface passivation influences the structural/color stability of AMX₃ perovskite NCs composed of two different M²⁺ cations. Here, we report the synthesis of blue-emitting Cs-oleate capped CsCd _x Pb_1-x Br₃ NCs, which exhibit a cubic perovskite phase containing Cd-rich domains of Ruddlesden-Popper phases (RP phases). The RP domains spontaneously transform into pure orthorhombic perovskite ones upon NC aging, and the emission color of the N

SUBMITTER: Imran M 

PROVIDER: S-EPMC7768894 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature