Surface polarization-induced emission and stability enhancement of CsPbX₃ nanocrystals.

ABSTRACT: Recently, the polarization effect has been receiving tremendous attention, as it can result in improved stability and charge transfer efficiency of metal-halide perovskites (MHPs). However, realizing the polarization effect on CsPbX₃ NCs still remains a challenge. Here, metal ions with small radii (such as Mg²⁺, Li⁺, Ni²⁺, etc.) are introduced on the surface of CsPbX₃ NCs, which facilitate the arising of electric dipole and surface polarization. The surface polarization effect promotes redistribution of the surface electron density, leading to reinforced surface ligand bonding, reduced surface defects, near unity photoluminescence quantum yields (PLQYs), and enhanced stability. Moreover, further introduction of hydroiodic acid r

SUBMITTER: Chen K 

PROVIDER: S-EPMC10445435 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature