2022 JCP-DCP Future of Chemical Physics Lecture. Talk Title: Dynamic Exciton Polaron in Two-Dimensional Lead Halides

2D lead halide perovskites have shown intriguing properties for optoelectronic applications. Both strongly bound excitons with binding energy up to a few hundreds of meV and polaronic characters have been observed in exciton spectral characters of 2D perovskites but how the interplay between them redefines the nature of exciton polarons and their excited-state behaviors still remains largely unexplored. In this talk, we discuss our recent experimental findings about the exciton polarons in 2D lead halide perovskites and their significant impact on the light emission and charge transfer properties.