1. Beijing National Laboratory for Molecular Science, Key Laboratory for the Physics and Chemistry of Nanodevices, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
2. Institute for Carbon-Based Thin Film Electronics, Peking University, Shanxi, Taiyuan 030012, China
3. Institute of Advanced Functional Materials and Devices, Shanxi University, Taiyuan 030031, China
4. Beijing Institute of Carbon-based Integrated Circuits, Beijing 100195, China
5. PKU-HKUST ShenZhen-HongKong Institution, Shenzhen 518057, China