1. CAS Key Laboratory of Materials for Energy Conversion; Shanghai Institute of Ceramics; Chinese Academy of Sciences (SICCAS); 1295 Dingxi Road Shanghai 200050 P. R. China
2. Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Sciences; 239 Zhangheng Road Pudong District Shanghai China 201204
3. Key Laboratory for Renewable Energy; Beijing Key Laboratory for New Energy Materials and Devices; Beijing National Laboratory for Condensed Matter Physics; Institute of Physics; Chinese Academy of Sciences; Beijing China 100190