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. 2017 Sep 14;7:11634. doi: 10.1038/s41598-017-12114-y

Figure 6.

Figure 6

(a) Valence-band spectra and (b) optical bandgap of each of the single layers for the semiconducting WIZO, the conducting WIZO, and the ITO that were measured using the XPS and the SE according to the extrapolation method.