1. Joint
Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
2. Materials
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
3. École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
4. Department
of Electrical Engineering and Computer Sciences, University of California, Berkeley, Berkeley, California 94720, United States
5. Physical
Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States