1. Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China
2. School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China
3. Organic and Carbon Electronics Lab (ORaCEL) North Carolina State University Raleigh NC 27695 USA
4. Information Materials and Intelligent Sensing Laboratory of Anhui Province Institutes of Physical Science and Information Technology Anhui University Hefei 230601 China
5. Songshan Lake Materials Laboratory Dongguan Guangdong 523808 China