Dual crystallization behaviour of polythiophene/fullerene blends A. Swinnen, I. Haeldermans, P. Vanlaeke, J. D'Haen, J. Poortmans, M. D'Olieslaeger and J. V. Manca Eur. Phys. J. Appl. Phys., 36 3 (2006) 251-256 Published online: 06 December 2006 DOI: 10.1051/epjap:2006138