1. Department of Physics, Centro Federal de Educacão Tecnológica Celso Suckow da Fonseca, Petrópolis 25620-003, Brazil
2. Institute Photovoltaïque d’Ille de France, Palaiseau 91120, France
3. Department of Electrical Engineering, Centro Federal de Educacão Tecnológica Celso Suckow da Fonseca, Rio de Janeiro 20271-110, Brazil