1. Energy Research Institute @ Nanyang Technological University (ERI@N), 637553, Singapore
2. Interdisciplinary Graduate School, Nanyang Technological University, 639798, Singapore
3. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
4. Centre for Sustainable Energy Systems, Research School of Engineering, The Australian National University, Canberra 2601, Australia
5. School of Materials Science and Engineering, Nanyang Technological University, 639977, Singapore