1. Center for Hybrid and Organic Solar Energy, Electronic Engineerng Department, University of Rome Tor Vergata, Rome, Italy
2. Enel Green Power SpA, Contrada Blocco Torrazze, Catania, Italy
3. CNRS, Grenoble INP, LMGP, Université Grenoble Alpes, Grenoble, France
4. BeDimensional, Genova, Italy
5. Istituto di Struttura della Materia (CNR-ISM) National Research Council, Rome, Italy