1. Advanced Functional Materials Lab, Dr S.S. Bhatnagar University Institute of Chemical Engineering & Technology, Panjab University, Chandigarh-160014, India
2. Department of Physics and Astronomical Science, Central University of Himachal Pradesh, Dharamshala, 176215, India
3. Energy Research Centre, Panjab University, Chandigarh-160014, India
4. Department of Physics, Panjab University, Chandigarh-160014, India