Factors limiting the open-circuit voltage in microcrystalline silicon solar cells M. Nath, S. Chakraborty, E.V. Johnson, A. Abramov, P. Roca i Cabarrocas and P. Chatterjee EPJ Photovolt., 2 (2011) 20101 Published online: 17 November 2011 DOI: 10.1051/epjpv/2011025