Photoinduced Current Transient Spectroscopy on Metal Halide Perovskites: Electron Trapping and Ion Drift.

ABSTRACT: Metal halide perovskites (MHPs) are disruptive materials for a vast class of optoelectronic devices. The presence of electronic trap states has been a tough challenge in terms of characterization and thus mitigation. Many attempts based on electronic spectroscopies have been tested, but due to the mixed electronic-ionic nature of MHP conductivity, many experimental results retain a large ambiguity in resolving electronic and ionic charge contributions. Here we adapt a method, previously used in highly resistive inorganic semiconductors, called photoinduced current transient spectroscopy (PICTS) on lead bromide 2D-like ((PEA)₂PbBr₄) and standard "3D" (MAPbBr₃) MHP single crystals. We present two conceptually different outcomes of the PICTS measurements, dist

SUBMITTER: Armaroli G 

PROVIDER: S-EPMC10580305 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature