Signatures of Polaron Dynamics in Photoexcited MAPbBr₃ by Infrared Spectroscopy.

ABSTRACT: Hybrid organic-inorganic perovskites (HOIPs) have attracted considerable attention in the past years as photoactive materials for low-cost, high-performance photovoltaics. Polaron formation through electron-phonon coupling has been recognized as the leading mechanism governing charge carrier transport and recombination in HOIPs. In this work, two types of MAPbBr₃ film samples deposited on different substrates (transparent insulating SrTiO₃ and a heterostructure mimicking a functioning photovoltaic cell) were photoexcited with above-bandgap radiation at 450 nm, and the effects of illumination on the sample were analyzed in the infrared region. The infrared absorbance detected at different powers of the photoexciting laser allowed us to obtain an estimate of the charact

SUBMITTER: Carpenella V 

PROVIDER: S-EPMC10658633 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature