1. Key Laboratory for Renewable EnergyBeijing Key Laboratory for New Energy Materials and DevicesInstitute of PhysicsChinese Academy of Sciences Beijing 100190 China
2. College of Material Science and Opto‐Electronic TechnologyUniversity of Chinese Academy of Sciences Beijing 101408 China
3. School of Physical SciencesUniversity of Chinese Academy of Sciences Beijing 100190 China
4. Laboratory for Advanced Materials and Electron MicroscopyInstitute of PhysicsChinese Academy of Sciences Beijing 100190 China
5. Chemistry DivisionBrookhaven National Laboratory Upton 11973 NY USA
6. Max Planck Institute for Chemical Physics of Solids Dresden 01187 Germany
7. National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan China