1. School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue 639798 Singapore
2. Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore
3. Institute of Artificial Photosynthesis State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Dalian 116024 P. R. China
4. Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore
5. Energy Research Institute @ NTU (ERI@N) Research Techno Plaza Nanyang Technological University 50 Nanyang Drive 637553 Singapore