1. Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
2. Instituto de Ciencia Molecular, Universidad de Valencia, 46980 Paterna, Spain
3. Nanomaterials Research Group, Department of Biotechnology, University of Verona, Strada Le Grazie 15, 37134 Verona, Italy
4. Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO), Consiglio Nazionale delle Ricerche (CNR) - Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” - SCITEC, Via Elce di Sotto 8, 06123 Perugia, Italy
5. Department of Natural Sciences and Mathematics, College of Sciences and Human Studies, Prince Mohammad Bin Fahd University, Khobar, Dhahran 34754 Saudi Arabia
6. SKKU Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, Suwon 440-746, Korea