Probing longitudinal carrier transport in perovskite thin films via modified transient reflection spectroscopy.

ABSTRACT: Accurate characterization of the longitudinal (along the thickness direction) carrier transport property is of significant importance for evaluating the quality and performance of perovskite thin films. Herein, we report the development of a modified transient reflection (TR) spectroscopy method to realize the direct observation and determination of the longitudinal carrier transport process in MAPbI₃ polycrystalline thin films. Unlike the traditional TR spectroscopy, the carrier transport dynamics along the film thickness is resolved by making the pump (excitation) and probe beams spatially separated on each side of the film, so that the carrier transport from the excitation side to the probe side is directly captured. Utilizing this method, the longitudinal carrier diffusion c

SUBMITTER: Zhao S 

PROVIDER: S-EPMC9297385 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature