Unraveling Halogen Role in Two-Step Solution Growth of Organic-Inorganic Hybrid Mixed-Halide Perovskites: Guidelines of Fabricating Single-Phase Perovskites with Predictable Stoichiometry.

ABSTRACT: The challenge faced in optoelectronic applications of halide perovskites is their degradation. Minimizing material imperfections is critical to averting cascade degradation processes. Identifying causes of such imperfections is, however, hindered by mystified growth processes and is particularly urgent for mixed-halide perovskites because of inhomogeneity in growth and phase segregation under stresses. To unravel two-step solution growth of MAPbBr _x I_3-x , we monitored the evolution of Br composition and found that the construction of perovskite lattice is contributed by iodine from PbI₂ substrate and Br from MABr solution with a 1:1 ratio rather than a 2:1 ratio originally thought. Kinetic analysis based on a derived three-stage model extract

SUBMITTER: Lee YR 

PROVIDER: S-EPMC11190909 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature