1. Department of Physics, Savitribai Phule Pune University, Pune 411007, India
2. Centre of Excellence in Solar Energy, Physical
and Materials Chemistry Division, National Chemical Laboratory (CSIR-NCL), Pune 411008, India
3. Department of Physics, Nowrosjee Wadia College, Pune 411001, India
4. UGC-DAE Consortium
for Scientific Research, University Campus, Indore 452001, India