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. 2016 Oct 27;6:35994. doi: 10.1038/srep35994

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Copyright © 2016, The Author(s)

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Perovskite, MAPbI₃, with PbI₂: (a) XRD patterns, (b) top-view SEM image of perovskite film, and (c) cross-section SEM image of complete device structure. Pure perovskite, MAPbI₃, without PbI₂: (d) XRD patterns, (e) top-view SEM image of perovskite film, and (f) cross-section SEM image of complete device structure. Pure perovskite, (MA)_x(FA)_1−xPbI_3, without PbI₂: (g) XRD patterns, (h) top-view SEM image of perovskite film, and (i) cross-section SEM image of complete device structure. As for pure MAPbI₃ and (MA)_x(FA)_1−xPbI₃ without PbI₂, 10 mg·ml⁻¹ of MAI solution and 8 + 2 mg·ml⁻¹ of MAI + FAI mixed solution were utilized for printing process, respectively.