1. Department of Chemistry and Center for NanoScience (CeNS), University of Munich (LMU), Butenandtstr. 11, 81377 Munich, Germany
2. Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO), Istituto CNR di Scienze e Tecnologie Chimiche “Giulio Natta” (CNR-SCITEC), 06123 Perugia, Italy
3. Experimental Physics VI, Julius Maximilian University of Würzburg, 97074 Würzburg, Germany
4. Surface Science Laboratory, Department of Materials and Earth Sciences, Technical University of Darmstadt, Otto-Berndt-Strasse 3, 64287 Darmstadt, Germany
5. Department of Chemistry, Biology and Biotechnology, University of Perugia and INSTM, Perugia 06123, Italy
6. Department of Natural Sciences & Mathematics, College of Sciences & Human Studies, Prince Mohammad Bin Fahd University, Al Khobar 31952, Saudi Arabia
7. SKKU Institute of Energy Science and Technology (SIEST) Sungkyunkwan University, Suwon 440-746, Korea