ArticleJournal of applied crystallography2026
Quantitative analysis of light-induced ion segregation in mixed-halide perovskites.
Article in Journal of applied crystallography, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Mixed-halide perovskites (MHPs) offer good band-gap tunability via stoichiometry changes, and such tunability is an essential property for the creation of multijunction solar cells. However, under illumination halide ions in MHPs segregate and create I- and Br-rich regions, which decrease the efficiency of potential solar cells. In this work, a method for a detailed investigation of the distribution of halide ions within an MHP during and after illumination is introduced. Calculations of the strain field created by the halide segregation were performed, and the obtained local displacement of atoms was used to calculate the X-ray diffuse scattering. By fitting the experimental data measured on a thin polycrystalline layer of FA
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