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(a) Optical transmittance spectra by UV–visible spectrometry of films deposited on quartz substrates at 200 °C. (b) Variation in bandgap energy of ZnO1−xSx films deposited on ZnO1−xSx quartz substrates at 200 °C with the chemical composition Reprinted with permission from Ref. [43]. Copyright 2011 Elsevier.
