1. Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau Avenida da Universidade Taipa Macau 999078 P. R. China
2. School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 P. R. China
3. Key Laboratory of Optoelectronic Technology and Systems Ministry of Education and Key Disciplines Laboratory of Novel Micro‐Nano Devices and System Technology College of Optoelectronics Engineering Chongqing University Chongqing 400044 P. R. China
4. Department of Physics and Chemistry Faculty of Science and Technology University of Macau Avenida da Universidade Taipa Macau 999078 P. R. China