1. Key Lab for Special Functional MaterialsMinistry of EducationNational and Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan University Kaifeng 475004 Henan China
2. Key Laboratory of Luminescence and Optical Information Ministry of EducationSchool of ScienceBeijing Jiaotong University Beijing 100044 China