Uphill and downhill charge generation from charge transfer to charge separated states in organic solar cells
Shahidul Alam, Vojtěch Nádaždy, Tomáš Váry, Christian Friebe, Rico Meitzner, Johannes Ahner, Aman Anand, Safakath Karuthedath, Catherine S. P. De Castro, Clemens Göhler, Stefanie Dietz, Jonathan Cann, Christian Kästner, A. Konkin, Wichard J. D. Beenken, Arthur Markus Anton, Christoph Ulbricht, Andreas Sperlich, Martin D. Hager, Uwe Ritter, Friedrich Kremer, Oliver Brüggemann, Ulrich S. Schubert, Daniel Ayuk Mbi Egbe, Gregory C. Welch, Vladimir Dyakonov, Carsten Deibel, Frédéric Laquai, Harald Hoppe
Abstract
Energy level alignments at the organic donor–acceptor interface cannot be predicted from cyclic voltammetry. Onsets for joint density of states and charge generation, reveal cases of energy uphill and – newly observed – downhill charge generation.