1. Department of Instrumentation Science, Jadavpur University, Kolkata 700032, India
2. Environment and Sustainability Institute, University of Exeter, Penryn Campus, Cornwall TR10 9FE, United Kingdom
3. Department of Physics, Jadavpur University, Kolkata 700032, India
4. Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Valais Wallis, CH-1951 Sion, Switzerland
5. Electrical and Electronics Engineering, School of Engineering and the Built Environment, Edinburgh Napier University, Merchiston Campus, Edinburgh EH10 5DT, United Kingdom