1. Department of Chemistry, City University of Hong Kong, Kowloon 999077, Hong Kong
2. Department of Materials Science and Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong
3. CAS Key Laboratory of Materials for Energy Conversion, Anhui Laboratory of Advanced Photon Science and Technology, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
4. Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology (NTUST), Taipei 10607, Taiwan
5. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan, ROC
6. Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
7. Center for Advanced Material Diagnostic Technology and College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, P. R. China
8. Siyuan Laboratory, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, Guangdong 510632, P. R. China
9. City University of Hong Kong Shenzhen Research Institute, Shenzhen, Guangdong 518057, China