1. Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Korea
2. Department of Mechanical Engineering, College of Engineering, Kyung Hee University, Yongin 17104, Korea
3. Basic and Applied Scientific Research Center, College of Science, Imam Abdulrahman Bin Faisal University, P. O. Box 1982, Dammam 31441, Saudi Arabia
4. Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P. O. Box 1982, Dammam 31441, Saudi Arabia
5. Physics Department, Faculty of Applied Science, Umm Al-Qura University, Makkah 24381, Saudi Arabia
6. Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore, Lahore 54000, Punjab, Pakistan
7. School of Materials and Energy, Southwest University, Chongqing 400715, China