1. Department of Physics The Chinese University of Hong Kong Shatin 999077 Hong Kong
2. Materials Simulation and Modelling and Center for Computational Energy Research Department of Applied Physics Eindhoven University of Technology P.O. Box 513 Eindhoven 5600MB The Netherlands
3. Department of Electronic and Information Engineering The Hong Kong Polytechnic University Kowloon 999077 Hong Kong
4. Hoffmann Institute of Advanced Materials Shenzhen Polytechnic 7098 Liuxian Boulevard Shenzhen 518055 P. R. China
5. Key Lab of Artificial Micro‐ and Nano‐Structures of Ministry of Education of China School of Physics and Technology Wuhan University Wuhan 430072 P. R. China
6. School of Environment and Energy State Key Laboratory of Luminescent Materials and Devices National Engineering Laboratory for VOCs Pollution Control Technology and Equipment South China University of Technology Guangzhou 510006 P. R. China
7. National Synchrotron Radiation Research Center Hsinchu Science Park Hsinchu 30076 Taiwan
8. Department of Chemical Engineering National Tsing Hua University Hsinchu 30013 Taiwan
9. Computational Materials Science Faculty of Science and Technology and MESA+ Institute for Nanotechnology University of Twente P.O. Box 217 Enschede 7500AE The Netherlands