1. College of Chemistry and Materials Science Sichuan Normal University Chengdu 610066 P. R. China
2. School of Materials and Energy University of Electronic Science and Technology of China Chengdu 610054 China
3. School of Energy Science and Engineering Harbin Institute of Technology Harbin 150001 P. R. China
4. Shanghai Electro‐Mechanical Engineering Institute Shanghai 201109 P. R. China
5. Nanotechnology Center, School of Fashion and Textiles The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong 999077 P. R. China
6. MOE Key Laboratory for UV Light‐Emitting Materials and Technology Northeast Normal University Changchun 130024 P.R. China