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. 2017 Mar 8;7:43794. doi: 10.1038/srep43794

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(a) Schematic diagram of memory device with a structure of Au (top electrode)/hybrid perovskite layer/ITO (bottom electrode)/glass substrate. (Right figure: schematic perovskite structure). (b) Photographs of CH₃NH₃PbI_3−xBr_x films. (c) UV-vis absorption spectra of CH₃NH₃PbI_3−xBr_x films. (d) X-ray diffraction pattern of hybrid perovskite layer with different Br⁻ ion contents to show shift of (110) peaks.