1. Photovoltaic and Sensor Applications Laboratory (TERIN/FSD/SAFS Lab), ENEA Research Center Portici, P.le Enrico Fermi, 1, 80055 Portici, Italy
2. Department of Chemical, Materials and Production Engineering, University of Naples Federico II, P.le V. Tecchio 80, 80125 Naples, Italy
3. Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Via Claudio 21, 80125 Naples, Italy