1. El-Manar University-ENIT, Photovoltaic and Semiconductor Materials Laboratory, PO Box 37, Le belvedere, 1002 Tunis, Tunisia
2. El-Manar University-ENIT, Photovoltaic and Semiconductor Materials Laboratory, PO Box 37, Le belvedere, 1002 Tunis, TunisiabHaïl University, Colleges of Engineering, Industrial Engineering Department, Haïl City 2440, Saudi Arabia