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- W4386226583 abstract "An improved understanding of the degradation pathways under external stimuli is needed to address stability challenges in two-dimensional (2D) perovskite semiconductor materials. In this study, in situ synchrotron nanoprobe X-ray fluorescence (nano-XRF) is used to investigate the evolution of halide redistribution within various 2D halide perovskite (n = 1–3) lateral heterostructures under ultraviolet (UV) exposure. The results show that iodine (I) experiences a loss in all cases, with the rate of change following the perovskite dimensionality monotonically. In contrast, bromine (Br) is relatively more stable than I in n = 2 and 3 heterostructures, with no significant change in the total Br concentration but a visible amount of Br diffusion to the previously I-rich regime. Combining nano-XRF and X-ray absorption spectroscopy (XAS), we found a reduction of dimensionality in crystals with n > 1 after UV exposure, indicating significant structural reconfiguration beyond ion migration." @default.
- W4386226583 created "2023-08-29" @default.
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- W4386226583 date "2023-08-01" @default.
- W4386226583 modified "2023-10-16" @default.
- W4386226583 title "Photo-induced halide redistribution in 2D halide perovskite lateral heterostructures" @default.
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- W4386226583 doi "https://doi.org/10.1016/j.joule.2023.08.003" @default.
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