In ref ( 28 ), it is shown that this can result in quite significant ZTO composition differences during the first nanometers of growth, likely due to the different nucleation times between the different sub-cycles.
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Atomic Layer Grown Zinc-Tin Oxide as an Alternative Buffer Layer for Cu<sub>2</sub>ZnSnS<sub>4</sub>-Based Thin Film Solar Cells: Influence of Absorber Surface Treatment on Buffer Layer Growth.
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