Collective Interactions of Quantum-Confined Excitons in Halide Perovskite Nanocrystal Superlattices.

ABSTRACT: Collective optical properties can emerge from an ordered ensemble of emitters due to interactions between the individual units. Superlattices of halide perovskite nanocrystals exhibit collective light emission, influenced by dipole-dipole interactions between simultaneously excited nanocrystals. This coupling changes both the emission energy and rate compared to the emission of uncoupled nanocrystals. We demonstrate how quantum confinement governs the nature of the coupling between the nanocrystals in the ensemble. The extent of confinement is modified by controlling the nanocrystal size or by compositional control over the Bohr radius. In superlattices made of weakly confined nanocrystals, the collective emission is red-shifted with a faster emission rate, showing the key characteristics

SUBMITTER: Levy S 

PROVIDER: S-EPMC11921029 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature