1. Clean Energy Research Laboratory (CERL), Department of Physics, COMSATS University Islamabad, Lahore Campus, Lahore 54000, Pakistan
2. Higher Education Department, Govt. of the Punjab, Lahore 54000, Pakistan
3. Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan
4. College of Engineering and Technology, American University of the Middle East, Egaila 54200, Kuwait
5. Department of Physics, University of Okara, Okara 56300, Pakistan