Characterization of Ni-doped TiO2 thin films deposited by dip-coating techniqueAbdelmalek Kharoubi, A. Bouaza, B. Benrabah, A. Ammari and A. KhialiEur. Phys. J. Appl. Phys., 72 3 (2015) 30301DOI: https://doi.org/10.1051/epjap/2015150282