Substrate and p-layer effects on polymorphous silicon solar cells S.N. Abolmasov, H. Woo, R. Planques, J. Holovský, E.V. Johnson, A. Purkrt and P. Roca i Cabarrocas EPJ Photovolt., 5 (2014) 55206 Published online: 16 July 2014 DOI: 10.1051/epjpv/2014007