1. Tel Aviv University Center for Nanoscience and Nanotechnology, and School of Electrical EngineeringTel Aviv University 55 Haim Levanon St. Tel Aviv 699780 Israel
2. Laboratory of Organic ElectronicsDepartment of Science and TechnologyLinköpings Universitet Bredgatan 33 60174 Norrköping Sweden
3. Faculty of AgricultureFood and EnvironmentHebrew University of Jerusalem POB 12 Rehovot 76100 Israel
4. Center of Excellence for Advanced Materials and Sensing DevicesRuđer Bošković Institute Bijenicˇka cesta 54 10000 Zagreb Croatia
5. Department of Physics and AstronomyUniversity of Bologna Viale Berti Pichat 6/2 I‐40127 Bologna Italy
6. Linz Institute for Organic Solar Cells (LIOS)Johannes Kepler University Altenbergerstrasse 69 A‐4040 Linz Austria