1. School of Electronic Science and Engineering Fujian Provincial Key Laboratory of Electromagnetic Wave Science and Detection Technology Xiamen University Xiamen 361005 P. R. China
2. Hoffman Institute of Advanced Materials Shenzhen Polytechnic 7098, Liuxian Blvd, Nanshan District Shenzhen 5018055 P. R. China
3. CAS Key Laboratory of Materials for Energy Conversion School of Chemistry and Materials Science University of Science and Technology of China Hefei Anhui 230026 P. R. China
4. Key Laboratory of Strongly Coupled Quantum Matter Physics Chinese Academy of Sciences School of Physical Sciences University of Science and Technology of China No. 96 Jinzhai Road Hefei Anhui Province 230026 P. R. China
5. College of Microscale Optoelectronics Engineering Shenzhen University Shenzhen 518060 P. R. China
6. Departamento de Física Universidad de La Laguna Apartado de Correos 456 San Cristóbal de La Laguna Santa Cruz de Tenerife E‐38200 Spain
7. Faculty of Chemistry Adam Mickiewicz University Uniwersytetu Poznańskiego 8 Poznań 61‐614 Poland
8. Department of Materials Science and Engineering University of Ioannina Ioannina GR‐451 10 Greece