1. Unit of Physics of Semiconductor Devices, Faculty of Science of Tunis, Tunis El Manar University, Tunis 2092, Tunisia
2. Faculty of Science of Bizerte, Carthage University, Zarzouna 7021, Tunisia
3. Laboratory of Physics of Lamellar and Nanomaterial Materials, Hybrids (LPMLNMH), Faculty of Science of Bizerte, Carthage University, Zarzouna 7021, Tunisia