1. CAS Research/Education Center for Excellence in Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
2. School of Chemical Science University of Chinese Academy of Sciences Beijing 100049 China
3. Department of Chemistry School of Science Beijing JiaoTong University Beijing 100044 China
4. Department of Physics and Organic and Carbon Electronics Lab North Carolina State University Raleigh NC 27695 USA
5. Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
6. Laboratory of Advanced Optoelectronic Materials College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China