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. 2022 May 30;5:67. doi: 10.1038/s42004-022-00683-7

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Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 3 — (A) 2D-false color plot for fs-transient absorption in the mid-infrared regions for FAPbBr₃ film using 530 nm as an excitation source. B Extracted kinetic trace at 4880 nm for FAPbBr₃ film. C 2D-false color plot for fs-transient absorption in the mid-infrared regions for FAPbI₃ film using 530 nm as an excitation source. D Extracted kinetic trace at 4960 nm for FAPbI₃ film.