Interplay of dielectric confinement and charge–phonon interactions in layered perovskites

Determine how dielectric confinement and charge–phonon interactions together influence the excited-state properties of two-dimensional layered lead halide perovskites.

Background

Two-dimensional layered lead halide perovskites exhibit strong excitonic effects due to dielectric confinement from polar inorganic slabs and less polar organic ligands. Separately, polaronic physics arising from charge–phonon coupling has been extensively studied in three-dimensional perovskites. Despite this, the combined impact of dielectric confinement and electron–phonon interactions on the excited-state properties of layered perovskites has not been fully clarified and represents a key uncertainty motivating the paper.

This problem concerns establishing a comprehensive understanding of how these two mechanisms jointly shape exciton energetics and related photophysical behavior in layered hybrid organic–inorganic perovskite structures.