1. Key Lab of Organic Optoelectronics and Molecular Engineering; Department of Chemistry; Tsinghua University; Beijing 100084 China
2. Tianjin Key Laboratory of Molecular Optoelectronic Sciences; Department of Chemistry; School of Sciences; Tianjin University & Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
3. School of Chemistry and Chemical Engineering; Qinghai Normal University; Xining 810000 China
4. National Synchrotron Radiation Laboratory; CAS Center for Excellence in Nanoscience; University of Science and Technology of China; Hefei 230029 China
5. Beijing National Laboratory for Condensed Matter Physics; Institute of Physics; Chinese Academy of Sciences; Beijing 100190 China