1. The Key Laboratory of Resource Chemistry of Ministry of Education
2. Shanghai Key Laboratory of Rare Earth Functional Materials
3. and Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors
4. Shanghai Normal University
5. Shanghai 200234, China
6. State Key Laboratory for Superlattices and Microstructures
7. Institute of Semiconductors
8. Chinese Academy of Sciences
9. Beijing 100083, China