X-Ray diffraction and Raman spectroscopy for a better understanding of ZnO:Al growth process C. Charpentier, P. Prod’homme, I. Maurin, M. Chaigneau and P. Roca i Cabarrocas EPJ Photovolt., 2 (2011) 25002 Published online: 17 January 2012 DOI: 10.1051/epjpv/2011026