1. Department of Electrical and Electronics Engineering Birla Institute of Technology and Science, Pilani Hyderabad Telangana 500078 India
2. Centre of Excellence for Green Energy and Sensor Systems Indian Institute of Engineering Science and Technology Shibpur Howrah 711103 India
3. Environment and Sustainability Institute University of Exeter Penryn TR10 9FE UK
4. College of Engineering Mathematics and Physical Science University of Exeter Penryn TR10 9FE UK