1. Photovoltaic Research Laboratory, Institute of Materials Science and Technology − Physics Faculty, University of Havana, San Lázaro y L, 10 400Havana, Cuba
2. Université de Lorraine, CNRS, IJL, F-54000Nancy, France
3. Université de Lorraine, LCP-A2MC, Institut Jean Barriol, 1 Blvd. Arago, 57070Metz, France
4. Université de Lorraine, CentraleSupélec, LMOPS, F-57000Metz, France