1. C.H.O.S.E. (Center for Hybrid and Organic Solar Energy), Electronic Engineering Department, University of Rome Tor Vergata, Via del Politecnico 1, 00133, Rome, Italy
2. ENEA - Centro Ricerche Frascati, Via Enrico Fermi, 45, 00044, Frascati, Rome, Italy
3. Istituto di Struttura della Materia (CNR-ISM) National Research Council, via del Fosso del Cavaliere 100, 00133, Rome, Italy