1. College of Chemistry and Key Laboratory of Environmentally
Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Xiangtan 411105, China
2. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory
of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
3. School of Materials Science & Engineering, Jiangsu Collaborative Innovation Central of Photovoltaic Science & Engineering, Changzhou University, Changzhou 213164, China