1. Department of Physics and Astronomy, National Institute of Technology, Rourkela 769008, India
2. Department of Science, School of Technology, Pandit Deendayal Petroleum University, Gandhinagar-382 007, Gujarat, India
3. Department of Solar Energy, School of Technology, Pandit Deendayal Petroleum University, Gandhinagar-382 007, Gujarat, India
4. Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
5. Department of Chemistry, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
6. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
7. Department of Materials Science and Engineering, Sharif University of Technology, 14588 Tehran, Iran