Effect of annealing on silicon heterojunction solar cells with textured ZnO:Al as transparent conductive oxide A. Salomon, G. Courtois, C. Charpentier, M. Labrune, P. Prod’Homme, L. Francke and P. Roca i Cabarrocas EPJ Photovolt., 3 (2012) 35002 Published online: 12 July 2012 DOI: 10.1051/epjpv/2012004