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• W4214807506 endingPage "112130" @default.
• W4214807506 startingPage "112130" @default.
• W4214807506 abstract "Scheelite structured AWO 4 compounds (A = Ba, Ca, Pb and Sr) are efficient hosts for rare-earth dopants. In this work, high-aspect-ratio AWO 4 (A = Ba, Ca, Pb and Sr) nanofibers, doped with 5 mol.% Tb and 5 mol.% Eu on A site, were synthesized using a sol-gel electrospinning technique, and their performances as a ratiometric sensor for the detection of UV light wavelength were comparatively studied. High-resolution electron microscopy reveals the presence of nanosized grains composing the nanofibers. The AWO 4 :5Tb-5Eu nanofibers exhibit strong characteristic photoluminescence (PL) and cathodoluminescence (CL) emission from both Tb 3+ and Eu 3+ ions. In the case of CaWO 4 lattice, the emission intensity ratio of Tb 3+ /Eu 3+ is found to show a linear relationship with the excitation wavelength in the tested range of 240–330 nm, with efficient energy transfer from host lattice to rare-earth ions. However, a similar result is not observed in other scheelite structured BaWO 4 , PbWO 4, and SrWO 4 nanofibers. The unique PL emission characteristics of CaWO 4 :5Tb-5Eu under different UV excitation wavelengths are due to its unique excitation band. This study reveals a potential new application of CaWO 4 :5Tb-5Eu as a fluorescent probe for UV wavelength detection. Additionally, the CL intensities from CaWO 4 :5Tb-5Eu nanofibers exhibit highly linear dependences on the applied voltage and current without saturation, which can be utilized for radiation detection. • Material design for efficient energy transfer from host lattice to rare-earth ions. • Electrospun synthesis of Tb and Eu doped AWO 4 (A = Ba, Ca, Pb and Sr) nanofibers. • Comparative studies of luminescence from nanocrystals of four scheelite hosts. • A novel ratiometric fluorescent probe for the detection of UV wavelengths. • High linear cathodoluminescence without saturation for radiation detection." @default.
• W4214807506 created "2022-03-05" @default.
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• W4214807506 date "2022-04-01" @default.
• W4214807506 modified "2023-10-16" @default.
• W4214807506 title "Rare-earth-doped electrospun scheelite CaWO4 nanofibers with excitation-dependent photoluminescence and high-linearity cathodoluminescence for ratiometric UV wavelength and radiation sensors" @default.
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• W4214807506 doi "https://doi.org/10.1016/j.optmat.2022.112130" @default.
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