1. Department of Physics The Chinese University of Hong Kong Shatin Hong Kong China
2. Department of Chemistry The Hong Kong University of Science and Technology Kowloon Hong Kong China
3. Department of Electronic and Information Engineering Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University Kowloon Hong Kong China
4. College of Electronic Science and Technology Shenzhen University Shenzhen China
5. Department of Electronic Engineering The Chinese University of Hong Kong Shatin Hong Kong China
6. Materials Science and Technology Research Center The Chinese University of Hong Kong Shatin Hong Kong China