1. Department of Energy Science
2. Sungkyunkwan University
3. Suwon
4. Republic of Korea
5. College of Information and Communication Engineering
6. Department of Electronics and Communication Engineering
7. Sikkim Manipal Institute of Technology
8. Sikkim Manipal University
9. Sikkim 737102
10. India
11. Department of Electrical and Electronics Engineering
12. Rajalakshmi Engineering College
13. Anna University
14. Chennai-602105
15. Physics of Energy Harvesting Division
16. CSIR-National Physical Laboratory
17. New Delhi 110 012