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The Na + -free and Na + co-doped Ca 9 Gd(VO 4 ) 7 :Eu 3+ , Dy 3+ phosphors have been synthesized by the conventional solid-state reaction. For the Na + -free Ca 9 Gd(VO 4 ) 7 :Eu 3+ , Dy 3+ phosphors, the emission spectra at λ ex =300nm exhibit red, yellow and blue emission due to f–f transitions...
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