1. Department of Chemistry, K.L.E. Institute of Technology, Hubballi 580 027, Karnataka, India
2. School of Advanced Sciences, KLE Technological University, Vidyanagar, Hubballi 580 031, Karnataka, India
3. Department of Energy Systems Research, Ajou University, Suwon 443-739, Republic of Korea
4. Université du Québec à Trois-Rivières, 3351 Boulevard des Forges, Trois-Rivières, Québec G9A 5H7, Canada
5. Thin Films Lab, Centre for Materials Science, K.L.E Technological University, Hubballi 580031, India