1. School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Wales, UK
2. Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
3. Polymer Energy Materials Laboratory, School of Chemical Engineering, Chonnam National University, Gwangju-61186, South Korea
4. Solar Energy Research Group, Faculty of Environment, Science and Economy, Environment & Sustainability Institute, University of Exeter, Penryn Campus, Cornwall TR10 9FE, UK
5. Central university of Gujarat, Gandhinagar, 382030, Gujarat, India
6. Symbiosis Center for Nanoscience and Nanotechnology (SCNN), Symbiosis International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
7. Laboratory for Solar Energy and Fuels (LSEF), School of Engineering, The University of British Columbia Kelowna V1V 1V7, Canada
8. Centre for Nanotechnology, Indian Institute of Technology Guwahati (IIT G), Guwahati, Assam, 781039, India
9. Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, PA 16802, USA