1. Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics, Collaborative Innovation Center for Optoelectronic Science and Technology, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
2. College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
3. School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tongyan Road 38, Tianjin 300350, China