Key Laboratory of Luminescence and Optical Information Ministry of Education;
Institute of Optoelectronic Technology Beijing Jiaotong University Beijing 100044 China;
Key Laboratory of Luminescence and Optical Information Ministry of Education;
Institute of Optoelectronic Technology Beijing Jiaotong University Beijing 100044 China;
School of Material Science and Engineering Beijing Institute of Technology Beijing 100081 China;
Key Laboratory of Luminescence and Optical Information Ministry of Education;
Institute of Optoelectronic Technology Beijing Jiaotong University Beijing 100044 China;