1. State Key Laboratory of Optoelectronic Materials and Technologies; School of Materials; Sun Yat-sen University; Guangzhou 510275 P. R. China
2. Radiation Detection Research Center; Northwest Institute of Nuclear Technology; P.O. Box 69-9 Xi'an Shanxi 710024 P. R. China
3. School of Nuclear Science and Technology; Xi'an Jiaotong University; Xi'an 710049 P. R. China
4. New Energy Research Institute; School of Environment and Energy; South China University of Technology; Guangzhou 510006 P. R. China
5. Department of Chemistry; Zhejiang University; Hangzhou 310000 P. R. China
6. State Key Laboratory of Particle Detection and Electronics; School of Physical Sciences; University of Science and Technology of China; Hefei 230040 P. R. China
7. Institute of High Energy Physics; Chinese Academy of Sciences; Beijing 100049 P. R. China
8. School of Radiation Medicine and Protection; Soochow University; Suzhou 510006 P. R. China