Stain-etched porous silicon nanostructures for multicrystalline silicon-based solar cells M. Ben Rabha, M. Hajji, S. Belhadj Mohamed, A. Hajjaji, M. Gaidi, H. Ezzaouia and B. Bessais Eur. Phys. J. Appl. Phys., 57 2 (2012) 21301 Published online: 23 December 2011 DOI: 10.1051/epjap/2011110348