1. Institute of Electronic Engineering
2. China Academy of Engineering Physics
3. Mianyang 621900, China
4. Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education
5. Department of Chemistry
6. Tsinghua University
7. Beijing 100084, China
8. Department of Materials Science and Engineering
9. University of Washington
10. Seattle, USA
11. Beijing Institute of Nanoenergy and Nanosystems
12. Chinese Academy of Sciences