Ayvacikli M.Ege A.Ekdal E.Popovici E.-J.Can N.2024-07-222024-07-22201209253467http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/17766This paper reports the luminescence emission spectra of Y(Ta,Nb)O 4 activated by rare earth ions such as Eu3+ and Tb 3+. 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. © 2012 Elsevier B.V. All rights reserved.EnglishDiagnosisEmission spectroscopyLightingLuminescenceMetal ionsNiobium compoundsPhosphorsX ray screensX raysYttriumLuminescence emissionNiobatesRadio-luminescenceRare earth activated phosphorsRare-earth activatorsSolid-state lighting applicationX-ray intensifying screensYttrium tantalatesRare earthsArticle10.1016/j.optmat.2012.05.023