The XPS spectra of the ITO, PTAA, and SAM substrates are shown in Figures a, b, and c, respectively. Quantitative analysis of the relative abundance of OH – groups reveals a decreasing trend from pristine ITO to PTAA to SAM, with SAM exhibiting the lowest OH – content (see Table ).
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Insights from Impedance Spectroscopy in Perovskite Solar Cells with Self-Assembled Monolayers: Decoding SAM's Tricks.
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