1. Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences (CAS), Ningbo 315201, People’s Republic of China
2. International School, University of Chinese Academy of Sciences, Beijing 100049, China
3. Department of Physics, Government College University Faisalabad (GCUF), Allama Iqbal Road, 38000 Faisalabad, Pakistan
4. Department of Microelectronic Science and Engineering, Faculty of Science, Ningbo University, Ningbo 315211, China
5. Key Laboratory of Semiconductor Materials Science, Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China