1. School of Materials Science and Engineering
2. Sun Yat-sen University
3. Guangzhou 510275
4. P. R. China
5. Research Institute of Tsinghua
6. Pearl River Delta
7. Corporation Accelerator
8. Guangzhou 510530
9. Department of Precision Instrument
10. Tsinghua University
11. Beijing 100084
12. Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices