1. Shenzhen Key Laboratory of Two-Dimensional Materials and Devices/Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics; Collaborative Innovation Center for Optoelectronic Science and Technology; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province; Shenzhen University; Shenzhen 518060 P. R. China
2. Key Laboratory of New Electric Functional Materials of Guangxi Colleges and Universities; Guangxi teachers Education University; Nanning 530023 P. R. China
3. Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education; School of Physics and Electronics; Hunan University; Changsha 410082 P. R. China
4. Department of Materials Science and Engineering; Southern University of Science and Technology; Shenzhen 518055 P. R. China