(461a) Spatiotemporal Imaging of Charge and Heat Transport in Two-Dimensional Hybrid Perovskites

Two-dimensional metal halide perovskites (2D-MHPs) are chemically and structurally diverse semiconducting materials with promising applications in photovoltaics and optoelectronics. The understanding of charge and heat transport is crucial for improving the device performance and stability, yet such understanding is challenged by the spatial inhomogeneity in these solution-processed materials. I will discuss our recent efforts on developing spatiotemporal optical imaging techniques, which permit the monitoring of the flow of charge carriers and heat, as well as the imaging of buried interfaces in spin-coated multilayer stacks. Our approach complements the more commonly employed time-resolved photoluminescence experiments and the well-established thermal-transport measurement techniques such as thermos-reflectance. The method provides a pathway towards fundamental understanding of charge-carrier dynamics and heat transport down to cryogenic temperatures, as well as insights into thermal management in 2D-MHPs and other hybrid semiconductors.