1. Department of Electrical
Engineering, Center for Advanced Photovoltaics, South Dakota State University, Brookings, South Dakota 57007, United States
2. Department
of Physics, Faculty of Science, University of Benghazi, Al Marj City, Libya
3. Department of Physics, Faculty of Science, Damietta University, New Damietta City 34517, Egypt
4. School of Biochemical Engineering, Anhui Polytechnic University, Wuhu, 241000, People’s Republic of China