1. Department of Building and Real Estate Research Institute for Sustainable Urban Development (RISUD) Research Institute for Smart Energy (RISE) The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong P. R. China
2. State Key Laboratory of Materials‐Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University No. 5 Xin Mofan Road Nanjing 210009 P. R. China
3. Department of Physics Tamkang University New Taipei City Taiwan 25137 P. R. China