TY - JOUR AU - Roland, Steffen AU - Schubert, Marcel AU - Collins, Brian AU - Kurpiers, Jona AU - Chen, Zhihua AU - Facchetti, Antonio AU - Ade, Harald AU - Neher, Dieter C2 - Journal of Physical Chemistry Letters DA - 2014-08-21 00:08:00 LA - en PB - Journal of Physical Chemistry Letters PY - 2014 TI - Fullerene-free polymer solar cells with strongly reduced bimolecular recombination and field- independent charge carrier generation ER -