Effects of sol concentration on structural, morphological and optical waveguiding properties of sol-gel ZnO nanostructured thin filmsMohand Tazerout, Azeddine Chelouche, Tahar Touam, Djamel Djouadi, Fares Boudjouan, Sebti Khodja, Salim Ouhenia, Alexis Fischer and Azzedine BoudriouaEur. Phys. J. Appl. Phys., 67 1 (2014) 10502DOI: https://doi.org/10.1051/epjap/2014140109