Ultrafast Charge Separation in Low Band-Gap Polymer Blend for Photovoltaics Margherita Maiuri, Giulia Grancini, Daniele Fazzi, Hans-J. Egelhaaf, Daniele Brida, Giulio Cerullo and Guglielmo Lanzani EPJ Web of Conferences, 41 (2013) 04010 Published online: 13 March 2013 DOI: 10.1051/epjconf/20134104010