1. School of Optoelectronic Science and Engineering
2. University of Electronic Science and Technology of China (UESTC)
3. Chengdu 610054
4. P. R. China
5. Key Laboratory for Organic Electronics and Information Displays
6. School of Materials Science and Engineering
7. Analytical & Testing Center
8. Sichuan University
9. Chengdu 610064
10. West China School of Public Health and Health Food Evaluation Research Center
11. Chengdu 610041