Abstract
New Eu2+ and/or Mn2+ activated Ca6La2Na2(PO4)6F2 phosphors were prepared and their photoluminescence properties upon ultraviolet excitation were investigated. Phosphor Ca6La2Na2(PO4)6F2:Eu2+,Mn2+ shows a broad blue emission band and an orange emission band, which originates from Eu2+ and Mn2+, respectively. The resonant type energy transfer from Eu2+ to Mn2+ was demonstrated, and the energy transfer efficiency was also calculated according to their PL decay curves. Tuning of the content of Mn2+ can generate the varied hues from blue to white and eventually to orange. Our results demonstrate that the phosphor is promising for producing UV-LED-based white LEDs.
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