1. Laboratory of Physical Alloys (LPA), College of Science, University of Dammam, Dammam 31113, Saudi Arabia;
2. Laboratoire Photovoltaïque, Centre de Recherches et des Technologies de l'Energie Technopole Borj Cedria, Hammam Lif 2050, Tunisia e-mail:
3. Laboratory of Physical Alloys (LPA), College of Science, University of Dammam, Dammam 31113, Saudi Arabia
4. Laboratoire Photovoltaïque, Centre de Recherches et des Technologies de l'Energie Technopole Borj Cedria, Hammam Lif 2050, Tunisia