1. Joint Center for Artificial Photosynthesis and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
2. Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
3. Joint Center for Artificial Photosynthesis, California Institute of Technology, Pasadena, California 91125, United States
4. Materials and Process Simulation Center (MC139-74), California Institute of Technology, Pasadena, California 91125, United States