1. Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM)
2. Nanjing Tech University (NanjingTech)
3. Nanjing 211816
4. P. R. China
5. School of Physical Science and Technology
6. Lanzhou University
7. Lanzhou 730000
8. Shaanxi Institute of Flexible Electronics (SIFE)