1. School of Physical Sciences (SPS), University of the Punjab, New Campus, 54590 Lahore, Pakistan
2. Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences (LUMS), 54792 Lahore, Pakistan
3. Department of Energy Conversion and Storage, Technical University of Denmark, Fysikvej, 2800 Kgs. Lyngby, Denmark