Vacuum Deposited Perovskites with a Controllable Crystal Orientation.

ABSTRACT: The preferential orientation of the perovskite (PVK) is typically accomplished by manipulation of the mixed cation/halide composition of the solution used for wet processing. However, for PVKs grown by thermal evaporation, this has been rarely addressed. It is unclear how variation in crystal orientation affects the optoelectronic properties of thermally evaporated films, including the charge carrier mobility, lifetime, and trap densities. In this study, we use different intermediate annealing temperatures T_inter between two sequential evaporation cycles to control the Cs_0.15FA_0.85PbI_2.85Br_0.15 orientation of the final PVK layer. XRD and 2D-XRD measurements reveal that when using no intermediate annealing primarily the (110) ori

SUBMITTER: Yan J 

PROVIDER: S-EPMC10561267 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature