1. King Abdullah University of Science and Technology (Kaust), Kaust Solar Center, Thuwal 23955-6900, Saudi Arabia
2. Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
3. Department of Chemistry, National University of Singapore, Singapore, 119077, Singapore
4. Department of Chemistry, Department of Electrical and Computer Engineering, Northwestern University, Evanston, Illinois 60208, United States
5. School of Materials Science and Engineering, University of New South Wales (UNSW), Sydney, NSW 2052, Australia