1. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, P.R. China
2. Materials and Energy Conversion Device, Key Laboratory of Organic Polymer Photoelectric Materials, School of Sciences, Xijing University Xi’an Key Laboratory of Advanced Photo-Electronics, Xi’an, P.R. China
3. School of Artificial Intelligence, Optics and Electronics (IOPEN), Northwestern Polytechnical University, Xi’an, Shaanxi, P.R. China