1. State Key Laboratory of Electronic Thin Films and Integrated Devices
2. and School of Optoelectronic Science and Engineering
3. University of Electronic Science and Technology of China
4. Chengdu 610054
5. China
6. Shenzhen Engineering Laboratory of phosphorene and Optoelectronics
7. Collaborative Innovation Center for Optoelectronic Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province
8. Shenzhen University
9. Shenzhen 518060