1. R&D Bharathiar University, Coimbatore, Tamil Nadu, India;
2. Department of Chemistry, S. S. Tegnoor Degree College, Gulbarga, Karnataka, India;
3. Department of Physics, Government First Grade College, Gurumitkal, Karnataka, India;
4. Department of Physics, Maharani’s Science College, Bangalore, Karnataka, India;
5. Department of Physics, Renewable Energy Laboratory, University of Tabuk, Tabuk, Saudi Arabia