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1.By careful structural and electronic characterization, it is shown that simultaneous substitutions of Eu3+ and Na+ at Ca2+ sites were possible using this methodology, which allows one to vary the local symmetry surrounding Eu3+ and moreover the energy transfer from O2-to Eu3+ and tungstate groups to Eu3+ for optimum luminescence.
2.Upon excitation, Eu3+ can exhibit a highly efficient and narrow emission via exchange interaction and dipole -dipole interaction for both energy migration and energy transfer from the host matrix to the luminescent center.
3.It can be used to modify the local site symmetry of the Eu3+ containing materials for improving the luminescence efficiency.
4.Calcium tungstate (CaWO4) is an important member of metal tungstate families.
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reworld: ½ð±Ò+3, ·­ÒëEPI+1 2012-03-16 14:30:51
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sltmac: ½ð±Ò+2 2012-03-23 09:38:15
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