1. Department of Electrical and Electronics Engineering, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, Hyderabad 500078, India
2. Department of Chemistry, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, Hyderabad 500078, India
3. Materials Center for Sustainable Energy & Environment, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, Hyderabad 500078, India