Quantification of Exciton Fine Structure Splitting in a Two-Dimensional Perovskite Compound.

ABSTRACT: Applications of two-dimensional (2D) perovskites have significantly outpaced the understanding of many fundamental aspects of their photophysics. The optical response of 2D lead halide perovskites is dominated by strongly bound excitonic states. However, a comprehensive experimental verification of the exciton fine structure splitting and associated transition symmetries remains elusive. Here we employ low temperature magneto-optical spectroscopy to reveal the exciton fine structure of (PEA)₂PbI₄ (here PEA is phenylethylammonium) single crystals. We observe two orthogonally polarized bright in-plane free exciton (FX) states, both accompanied by a manifold of phonon-dressed states that preserve the polarization of the corresponding FX state. Introducing a magnetic fiel

SUBMITTER: Posmyk K 

PROVIDER: S-EPMC9150119 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature