1. Key Laboratory of Optoelectronic Technology & System, Ministry of Education, Chongqing University, Chongqing 400044, China
2. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
3. College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China
4. College of Microelectronic and Communication Engineering, Chongqing University, Chongqing 400044, China