Mapping structure heterogeneities and visualizing moisture degradation of perovskite films with nano-focus WAXS.

ABSTRACT: Extensive attention has focused on the structure optimization of perovskites, whereas rare research has mapped the structure heterogeneity within mixed hybrid perovskite films. Overlooked aspects include material and structure variations as a function of depth. These depth-dependent local structure heterogeneities dictate their long-term stabilities and efficiencies. Here, we use a nano-focused wide-angle X-ray scattering method for the mapping of film heterogeneities over several micrometers across lateral and vertical directions. The relative variations of characteristic perovskite peak positions show that the top film region bears the tensile strain. Through a texture orientation map of the perovskite (100) peak, we find that the perovskite grains deposited by sequential spray-coating g

SUBMITTER: Li N 

PROVIDER: S-EPMC9637205 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature