Structure-Emission Property Relationship of Bilayer 2D Hybrid Perovskites.

ABSTRACT: Two-dimensional hybrid perovskites (2D-PVKs) have shown great promise for optoelectronic applications. However, the structure-emission property relationship of 2D-PVKs, particularly those with multiple octahedral layers in the metal-halide lattice (n > 1), is not fully understood. Here we combine experimental and theoretical studies to investigate a series of bilayer (n = 2) 2D-PVK crystals in both Ruddlesden-Popper (RP) and Dion-Jacobson (DJ) phases. Our results reveal that DJ-phase crystals exhibit a higher degree of octahedral lattice distortion compared with RP-phase crystals, with this distortion scaling inversely with interlayer spacing. Such octahedral distortion leads to (1) lower formation energies for iodine vacancies that act as nonradiative recombination centers,

SUBMITTER: Song Y 

PROVIDER: S-EPMC12164342 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature