1. Johannes Kepler University Linz, Linz Institute for Organic Solar Cells (LIOS), Institute of Physical Chemistry, Altenberger Str. 69, 4040 Linz, Austria
2. Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
3. Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warszawa, 00-664, Poland