Luminescence properties of Europium and Terbium doubly activated yttrium Niobium/ Tantalate Phosphors under X-ray excitation
Yttrium tantalate, yttrium niobium-tantalate, and yttrium niobate doubly doped by Eu3 and Tb3 were investigated using X-ray diffraction and X-ray excitation luminescence in order to study their structural and luminescent properties. By means of X-ray diffraction, the crystallographic data for YT...
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| Autores principales: | , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
D.Ghitu Institute of Electronic Engineering and Nanotechnologies
2009
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/212e3de6bac240498686c7c91a5340fe |
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| Sumario: | Yttrium tantalate, yttrium niobium-tantalate, and yttrium niobate doubly doped by Eu3
and Tb3 were investigated using X-ray diffraction and X-ray excitation luminescence in order
to study their structural and luminescent properties. By means of X-ray diffraction, the crystallographic data for YTaO4, Y(TaNb)O4, and YNbO4 with double activation by Eu3
and Tb3
was first calculated. Under X-ray excitation luminescence, the rare earth emission centers can
contribute to the overall luminescence. The simultaneous incorporation of Eu3
and Tb3
ions
could permit us to obtain different luminescence colors on the entire visible spectrum. Due to
their various luminescence chromaticities, the proposed rare earth activated phosphors are
promising materials for optoelectronics as well as for X-ray intensifying screens for medical
diagnosis providing the broad variation of photoluminescence colors from blue-to-green to
yellow-to-red. |
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