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Terbium activated yttrium tantalate (YTaO 4 :Tb) samples were prepared by solid-state reaction from homogeneous mixtures of Y 2 O 3 and Ta 2 O 5 for host-lattice formation, Tb 4 O 7 or Tb(NO 3 ) 3 ·5H 2 O as activator source and Li 2 SO 4 , Na 2 SO 4 , CsF, Na 4 P 2 O ...
Efficient phosphors based on YNbO4 and doped by Eu3+, Ga3+, Al3+ were synthesized and investigated under UV, and X-ray excitation in luminescence and Raman spectroscopy. Monoclinic fergusonite crystal structure and excellent luminescent properties under X-ray excitation allow recommend these phosphors as good candidates for different applications.
New peaks at 524 and 589 cm-1 in Raman spectroscopy of double activated YNbO4:Eu3+,Tb3+ were observed and identified. The nature of this phenomenon is discussed.
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