1. Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Haridwar 247667, Uttarakhand, India
2. Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland
3. Department of Solar Energy, School of Technology, Pandit Deendayal Energy University, Gandhinagar 382007, Gujarat, India
4. Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India