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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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(a) UV-vis absorption spectra with (b) a zoom-in view near the absorption edge, and (c) X-ray diffraction patterns of the high-quality MAPbI₃ thin films without and with MABr treatment at different concentrations, as indicated.