Exogenous Metal Cations in the Synthesis of CsPbBr₃ Nanocrystals and Their Interplay with Tertiary Amines.

ABSTRACT: Current syntheses of CsPbBr₃ halide perovskite nanocrystals (NCs) rely on overstoichiometric amounts of Pb²⁺ precursors, resulting in unreacted lead ions at the end of the process. In our synthesis scheme of CsPbBr₃ NCs, we replaced excess Pb²⁺ with different exogenous metal cations (M) and investigated their effect on the synthesis products. These cations can be divided into two groups: group 1 delivers monodisperse CsPbBr₃ cubes capped with oleate species (as for the case when Pb²⁺ is used in excess) and with a photoluminescence quantum yield (PLQY) as high as 90% with some cations (for example with M = In³⁺); group 2 yields irregularly shaped CsPbBr₃ NCs with broad size distributions. In both cases,

SUBMITTER: Li Z 

PROVIDER: S-EPMC12442710 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature