2019/11/24 by Géraud Delport, Delport, Géraud, Stuart Macpherson +3
Engineering · Materials Science · #Applied Physics (physics.app-ph) #Chalcogenide Semiconductor Thin Films #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Optics (physics.optics) #Perovskite Materials and Applications #Quantum Dots Synthesis And Properties
paper · pdf · doi:10.48550/arxiv.1911.10615
openalex publication_date 2019/11/24 · openalex created_date 2022/07/22 · openalex updated_date 2026/07/28
Halide perovskites have remarkable properties for relatively crudely\nprocessed semiconductors, including large optical absorption coefficients and\nlong charge carrier lifetimes. Thanks to such properties, these materials are\nnow competing with established technologies for use in cost-effective and\nefficient light harvesting and light emitting devices. Nevertheless, our\nfundamental understanding of the behaviour of charge carriers in these\nmaterials particularly on the nano to micro scale has on the whole lagged\nbehind the empirical device performances. Such understanding is essential to\ncontrol charge carriers, exploit new device structures, and push devices to\ntheir performance limits. Among other tools, optical microscopy and\nspectroscopic techniques have revealed rich information about charge carrier\nrecombination and transport on important length scales. In this Progress\nReport, we detail the contribution of time-resolved optical microscopy\ntechniques to our collective understanding of the photophysics of these\nmaterials. We discuss ongoing technical developments in the field that are\novercoming traditional experimental limitations in order to visualise transport\nproperties over multiple time and length scales. Finally, we propose strategies\nto combine optical microscopy with complementary techniques in order to obtain\na holistic picture of local carrier photophysics in state of the art perovskite\ndevices.\n