1. State Key
Laboratory of Luminescence and Applications, Changchun Institute of
Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, No. 3888 Dongnanhu Road, Changchun 130033, People’s Republic of China
2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
3. Department
of Materials Science, Fudan University, Shanghai 200433, People’s Republic of China