1. Key Laboratory of Luminescence and Optical InformationMinistry of EducationBeijing Jiaotong University Beijing 100044 China
2. College of Physics and Electronic EngineeringTaishan University Taian Shandong Province 271021 China
3. State Centre for International Cooperation on Designer Low‐Carbon & Environmental MaterialsSchool of Materials Science and EngineeringZhengzhou University Zhengzhou Henan Province 450001 China