EPR study of ZnS:Mn2+ nanocrystals and pyrex glasses |
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| Authors: | Junye Liu Chunxu Liu Yingguang Zheng Dan Li Kai Dou Wu Xu Jiaqi Yu |
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| Affiliation: | (1) Changchun Institute of Physics, Chinese Academy of Sciences, 130021 Changchun, China;(2) Analysis Test and Experiment Center, Jilin University, 130021 Changchun, China;(3) Laboratory of Excited State Prceeses, Chinese Academy of Sciences, 130021 Changchun, China |
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| Abstract: | Pyrex glasses with different ZnS: Mn2+ contents were prepared by melting method. It has been found that Mn ion may occupy two sites: (Mn2+)sub, and (Mn2+)int from photoluminescene (PL) and photoluminescence excitation (PLE) spectra. The results were confirmed by the further electron panmagnetic resonance (EPR) experiments and the three types of states (Mn2+)sub, (Mn2+)int,and Mn clusters were identified. It was observed that theg-factor and the hyperfine structure (HFS) constant increase with the decreasing size of nanocrystallite. This may result from hybridization of sp3 electron states of ZnS and 3d5 electron states of Mn by the effects of quantum confinement and the surface states. Project supported by the National Natural Science Foundation of China and Laboratory of Excited State Processes, Chinese Academy of Sciences. |
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| Keywords: | ZnS: Mn2+ nanocrystals and pyrex glasses composites EPR spectra g-factor and HES constants |
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