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.
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References
Bhargava, R., Gallagher, D., Hong, X. et al., Optical properties of Manganesedoped nanocrystals of ZnS,Phys. Rev. Lett., 1994, 72: 416.
Sooklal, K., Cullurn, B. S., Angel, S. M. et al., Photophysical properties of ZnS nanoclusters with spatially localized Mn2+,J. Phys. Chem., 1996, 100: 4551.
Yu Jiaqi, Liu Huimin, Wang Yanyun et al., Irradiation-induced luminescence enhancement effect of znS:Mn2+ nancaystales in polymer films,Opt Lett., 1997, 22: 913.
Liu Junye, Liu Chunxu, Li Danetal, Three types of sites of Mn2+ in glasses with dispersed ZnS: Mn2+ nanouystals,Phys. Rev. B, 1998, Vol. 55, to be published.
Grim, D. L., Grim, R. E., Paramagnetic resonance of Mn2+ in glasses and compounds of the lithium borate system,J. Gem. Phys., 1967, 47: 2711.
Soo, Y. L., Ming, Z. H., Huang, S. W. et al., Local structure mund Mn luminescent centers in Mn-doped mnomystals of ZnS,Phys. Rev., 1994, B50: 7602.
Brus. L., A simple model for the ionization potential, electron affiity, and aqueous redcnr potentials of snail semimductur uystallites,J. Chen. Phys., 1983, 79: 5566.
Kennedy, T., Glaser, E., Klein, P. et al., Symmetry and electronic structure of the Mn impurity in ZnS nanocrystals,Phys. Rev.,1995, 52: R14356.
Poole, Jr. C. P.,Electron Spin Resonance, New York: Wiley, 1983, 8.
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Project supported by the National Natural Science Foundation of China and Laboratory of Excited State Processes, Chinese Academy of Sciences.
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Liu, J., Liu, C., Zheng, Y. et al. EPR study of ZnS:Mn2+ nanocrystals and pyrex glasses. Sci. China Ser. A-Math. 42, 387–391 (1999). https://doi.org/10.1007/BF02874257
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DOI: https://doi.org/10.1007/BF02874257