Acceptor Energy Offset Manages Ultrafast Recombination Dynamics in Donor-Acceptor Mixtures V. G. Pavelyev, O. D. Parashchuk, T. V. Orekhova, I. F. Perepichka, D. Yu. Paraschuk, P. H. M. van Loosdrecht and M. S. Pshenichnikov EPJ Web of Conferences, 41 (2013) 05036 Published online: 13 March 2013 DOI: 10.1051/epjconf/20134105036