1. School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Tianjin University Tianjin China
2. National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei China
3. Co‐Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and Engineering Nanjing Forestry University Nanjing China
4. State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun China