1. Linz Institute for Organic Solar Cells (LIOS) Physical Chemistry, Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz, Austria
2. Institute of Materials Chemistry, TU Wien, Getreidemarkt 9, 1060 Wien, Austria
3. Institute of Solid-State Physics, Johannes Kepler University-Linz, Altenberger Straße 69, 4040 Linz, Austria
4. Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz, Austria
5. Department of Chemistry, Institute of Material Science, University of Connecticut, Storrs, Connecticut 06269, United States
6. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, United States
7. Austria Institute of Biophysics, Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz, Austria