1. University of Bologna, Alma Mater Studiorum, Dipartimento di Chimica, G. Ciamician, Bologna, Italy
2. Laboratory of Renewable Energies-Photovoltaics, R&D National Institute for Electrochemistry and Condensed Matter, Dr. A. Paunescu Podeanu Str. No. 144, Timisoara, RO-300569, Romania