Many-Exciton Quantum Dynamics in a Ruddlesden-Popper Tin Iodide.

ABSTRACT: We present a study on the many-body exciton interactions in a Ruddlesden-Popper tin halide, namely, (PEA)₂SnI₄ (PEA = phenylethylammonium), using coherent two-dimensional electronic spectroscopy. The optical dephasing times of the third-order polarization observed in these systems are determined by exciton many-body interactions and lattice fluctuations. We investigate the excitation-induced dephasing (EID) and observe a significant reduction of the dephasing time with increasing excitation density as compared to its lead counterpart (PEA)₂PbI₄, which we have previously reported in a separate publication [J. Chem. Phys.2020, 153, 164706]. Surprisingly, we find that the EID interaction parameter is four orders of magnitude higher in

SUBMITTER: Rojas-Gatjens E 

PROVIDER: S-EPMC10626601 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature