1. Key Laboratory of Eco-Materials Advanced Technology, College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, P. R. China
2. Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P. R. China
3. Department of Microelectronic Science and Engineering, Ningbo University, Ningbo 315211, P. R. China
4. School of Materials Science and Engineering and Center for Integrated Computational Materials Science, International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, P. R. China