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- W4313305589 abstract "Focused ion beam (FIB) techniques have been frequently used to section metal-halide perovskites for microstructural investigations. However, the ion beams directly irradiated to the sample surface may alter the properties far different from pristine, potentially leading to modified deterioration mechanisms under aging stressors. Here, we combine complementary approaches to measure the subsurface characteristics of polished perovskite and identify the chemical species responsible for the measured properties. Analysis of the experimental results in conjunction with Monte Carlo simulations indicates that atomic displacements and local heating occur in the subsurface of methylammonium lead iodide (MAPbI3) by glazing Ar+ beam irradiation (15 nm by 4 kV at 3 degree). The lead-rich, iodine-deficient surface promotes rapid phase segregation under thermal aging conditions. On the other hand, despite the subsurface modification, our experiments confirm the rest of the MAPbI3 bulk retains the material integrity. Our observation supports that polished perovskites could serve in studying the properties of bulk or buried junctions far away from the altered subsurface with care." @default.
- W4313305589 created "2023-01-06" @default.
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- W4313305589 date "2022-12-27" @default.
- W4313305589 modified "2023-09-23" @default.
- W4313305589 title "Subsurface Characteristics of Metal-Halide Perovskites Polished by Argon Ion Beam" @default.
- W4313305589 doi "https://doi.org/10.48550/arxiv.2212.13694" @default.
- W4313305589 hasPublicationYear "2022" @default.
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