1. Laboratory of Semiconductors, Nanostructures and Advanced Technology (LSNTA), Center for Research and Technology Energy, Tourist Route Soliman, BP 95, 2050 Hammam-Lif, Tunisia
2. Ecole Supérieure Privée d’Ingénieurs et des Etudes Technologiques, Université arabe des Sciences, Tunis, Tunisia
3. Laboratory of Advanced Materials and Quantum Phenomena, Tunis-El Manar University, Department of Physics, Tunis, Tunisia