Hysteretic Ion Migration and Remanent Field in Metal Halide Perovskites.

ABSTRACT: The gap in understanding how underlying chemical dynamics impact the functionality of metal halide perovskites (MHPs) leads to the controversy about the origin of many phenomena associated with ion migration in MHPs. In particular, the debate regarding the impact of ion migration on current-voltage (I-V) hysteresis of MHPs devices has lasted for many years, where the difficulty lies in directly uncovering the chemical dynamics, as well as identifying and separating the impact of specific ions. In this work, using a newly developed time-resolved time-of-flight secondary ion mass spectrometry CH₃NH₃ ⁺ and I^- migrations in CH₃NH₃PbI₃ are directly observed, revealing hysteretic CH₃NH₃

SUBMITTER: Liu Y 

PROVIDER: S-EPMC7539187 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature