2D modelling of polycrystalline silicon thin film solar cells Ana-Maria Teodoreanu, Felice Friedrich, Rainer Leihkauf, Christian Boit, Caspar Leendertz and Lars Korte EPJ Photovolt., 4 (2013) 45104 Published online: 08 July 2013 DOI: 10.1051/epjpv/2013017