Study of structural and optical properties of iron doped ZnO thin films prepared by sol-gel Azeddine Chelouche, Djamel Djouadi and Ali Aksas Eur. Phys. J. Appl. Phys., 64 1 (2013) 10304 Published online: 25 October 2013 DOI: 10.1051/epjap/2013130336