TY - JOUR AU - Steffen Roland AU - Marcel Schubert AU - Brian Collins AU - Jona Kurpiers AU - Zhihua Chen AU - Antonio Facchetti AU - Harald Ade AU - Dieter Neher 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 -