Deposition Kinetics and Compositional Control of Vacuum-Processed CH3NH3PbI3 Perovskite

• DOI: 10.1021/acs.jpclett.0c01995
• Publication Date: 2020-07-23T16:38:11Z
• Authors: Beom-Soo Kim; Lidón Gil-Escrig; Michele Sessolo; Henk J. Bolink
• Keywords: Sublimation; Stoichiometry; Deposition; Vacuum deposition; Crystal (programming language)

Halide perovskites have generated considerable research interest due to their excellent optoelectronic properties in the past decade. To ensure formation of high-quality semiconductors, deposition process for perovskite film is a critical issue. Vacuum-based processing considered be promising method, allowing, principle, uniform on large area. One benefits vacuum control over composition through use quartz crystal microbalances (QCMs) that monitor rates components situ. In metal halide perovskites, however, one frequently employed component or precursor, CH3NH3I, exhibits nonstandard sublimation properties. Here, we study detail CH3NH3I and demonstrate by correcting its complex adsorption modeling growth, accurate predictions stoichiometry final can obtained.