1. Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, 100044 Beijing, China
2. College of Physics and Electronic Engineering, Taishan University, 271021 Taian, Shandong Province, China
3. State Centre for International Cooperation on Designer Low-Carbon & Environmental Materials, School of Materials Science and Engineering, Zhengzhou University, 450001 Zhengzhou, Henan Province, China