1. Ming Hsieh Department of Electrical Engineering, ‡Department of Physics & Astronomy, §Mork Family Department of Chemical Engineering and Material Science, and ∥Center for Energy Nanoscience, University of Southern California, Los Angeles, California, 90089, United States
2. Division
of Chemistry and Chemical Engineering and #Joint Center for Artificial Photosynthesis
(JCAP), California Institute of Technology, Pasadena, California, United States