1. Department of Chemistry, Amity Institute of Applied Sciences (AIAS) Amity University Kolkata 700156 India
2. Amity Institute of Biotechnology Amity University Kolkata 700156 India
3. Department of Chemistry University of Calcutta 92, A. P. C. Road Kolkata West Bengal 700 009 India
4. Department of Physics, The Bhawanipur Education Society College University of Calcutta Kolkata 700020 India
5. Energy Materials and Devices Division CSIR‐Central Glass and Ceramic Research Institute Kolkata 700 032 India