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. 2016 Aug 1;7:12305. doi: 10.1038/ncomms12305

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Copyright © 2016, The Author(s)

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Top view of the SEM images of (a) MAPbI₃ and (b) MABr-treated MAPbI₃ films. Scale bars, 1 μm. Comparison of (c) UV-vis absorption spectra and (d) X-ray diffraction patterns of MAPbI₃ films with and without MABr treatment.