1. Key Laboratory of Optoelectronic Materials Chemistry and Physics Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P. R. China
2. University of Chinese Academy of Sciences Beijing 100049 P. R. China
3. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou Fujian 350108 P. R. China