While the band gap of the manufactured samples showed a trend similar to the calculated values, the experimental band gap values were higher.
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Fabrication and Composition of MA<sub>1-<i>y</i></sub> FA <sub><i>y</i></sub> SnI<sub>3-<i>x</i></sub> Br <sub><i>x</i></sub> Thin Films for Lead-Free Perovskite Solar Cells.
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