Radioluminescence study of rare earth doped some yttrium based phosphors

• Published in: Optical materials 2012-09, Vol.34 (11), p.1958-1961
• Main Authors: Ayvacıklı, Mehmet, Ege, Arzu, Ekdal, Elçin, Popovici, Elisabeth-Jeanne, Can, Nurdoğan
• Format: Article
• Language: English
• Subjects: Activated; Illumination; Luminescence; Niobates; Phosphors; Radioluminescence (RL); Rare earth metals; Rare earths; X-rays; Yttrium; Yttrium niobate; Yttrium tantalate
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2012.05.023

[Display omitted] ► Phosphors samples were prepared by solid-state reaction route. ► Y(Ta,Nb)O4 phosphors activated by Eu3+ and Tb3+. ► Radioluminescence spectra of Y(Ta,Nb)O4 phosphors. ► Rare earth transitions are particularly sensitive to the site symmetry. This paper reports the luminescence emission spectra of Y(Ta,Nb)O4 activated by rare earth ions such as Eu3+ and Tb3+. The influence of these rare earth ions on the radioluminescence (RL) of yttrium niobate and tantalate phosphors was investigated. The luminescent properties were studied under X-ray and preliminary RL measurements to further evaluate prepared materials. The emission centers of the rare earth activators (Eu3+, Tb3+) were found to contribute efficiently to the total luminescence. With their various luminescence chromaticities, these rare earth activated phosphors are promising materials for solid-state lighting applications as well as for X-ray intensifying screens in medical diagnosis, providing the broad band variation of visible RL from blue to red.