1. King Abdullah University of Science and Technology (KAUST) KAUST Solar Center (KSC) and Physical Science and Engineering Division (PSE) Thuwal 23955‐6900 Saudi Arabia
2. Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China
3. Department of Materials Science and Engineering North Carolina State University (NCSU) Raleigh NC 27695 USA
4. Cornell High Energy Synchrotron Source Cornell University Ithaca NY 14853 USA