1. Hunan Key Laboratory for Super Microstructure and Ultrafast Process School of Physics and Electronics Central South University Changsha 410083 China
2. Institute of Polymers and Energy Chemistry College of Chemistry Nanchang University Nanchang 330031 China
3. State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China
4. Department of Materials Science and Engineering, and Shenzhen Engineering Research and Development Center for Flexible Solar Cells Southern University of Science and Technology Shenzhen 518055 China
5. College of Materials Science and Engineering Hunan University Changsha Hunan 410082 China
6. College of Chemistry and Chemical Engineering Central South University Changsha 410083 P. R. China