1. Laboratory of Advanced Optoelectronic Materials College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
2. School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Tianjin University Tianjin 300350 China
3. Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Siyuan Laboratory Department of Physics Jinan University Guangzhou 510632 China
4. Department of Physics Organic and Carbon Electronics Lab (ORaCEL) North Carolina State University Raleigh NC 27695 USA
5. Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China