1. National Renewable Energy Laboratory, Golden, Colorado 80401, United States
2. Materials Science Program, Colorado School of Mines, Golden, Colorado 80401, United
States
3. Stanford Synchrotron Radiation Lightsource at SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
4. Department
of Chemistry and Geochemistry, Colorado School of Mines, Golden, Colorado 80401, United States
5. SAGE Electrochromics, Inc., Faribault, Minnesota 55021, United States
6. Stanford Institute for Materials & Energy Science at SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States