Stain-etched porous silicon nanostructures for multicrystalline silicon-based solar cellsM. Ben Rabha, M. Hajji, S. Belhadj Mohamed, A. Hajjaji, M. Gaidi, H. Ezzaouia and B. BessaisEur. Phys. J. Appl. Phys., 57 2 (2012) 21301DOI: https://doi.org/10.1051/epjap/2011110348