1. Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education) College of Optoelectronic Engineering Chongqing University Chongqing 400044 China
2. College of Optoelectronic Engineering Chongqing University of Posts and Telecommunications Chongqing 400065 China
3. Department of Chemistry Shandong University Weihai 264200 China
4. Institute of Materials Chinese Academy of Engineering Physics Jiangyou 621908 China
5. School of Materials Science and Engineering Zhengzhou University Zhengzhou 450001 China