1. School of Chemistry and Materials Science, Anhui Normal University, 189 Jiuhua South Road, Wuhu, Anhui 241002, China
2. Laboratory of Molecular Materials and Devices, Department of Materials Science, Fudan University, 2005, Songhu Road, Shanghai 200438, China
3. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China