1. Shanghai Key Lab of Electrical Insulation and Thermal Aging; Shanghai Electrochemical Energy Devices Research Center; School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; No. 800 Dongchuan Rd., Minhang District Shanghai 200240 P. R. China
2. Engineering Lab for TFT-LCD Materials and Technologies; Department of Electronic Engineering; Shanghai Jiao Tong University; No. 800 Dongchuan Rd., Minhang District Shanghai 200240 P. R. China
3. Key Laboratory of Organic OptoElectronics and Molecular Engineering; Department of Chemistry; Tsinghua University; Zhongguancun Street, Haidian District Beijing 100084 P. R. China
4. Institute of Chemistry; Chinese Academy of Sciences; Zhongguancun North First Street 2, Haidian District Beijing 100190 P. R. China