Institute of Semiconductors and Solid-State Physics, Johannes Kepler University, 69 Altenbergerstrasse, 4040 Linz, Austria 5 CNR-SPIN, UOS Salerno, 84084 Fisciano (SA), Italy * Authors to whom correspondence should be addressed. Coatings 2021, 11(3), 276; https://doi.org/10.3390/coatings1103...