Photoluminescence of the Eu<sup>3+</sup>-Activated Y<sub>x</sub>Lu<sub>1−x</sub>NbO<sub>4</sub> (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors
Eu<sup>3+</sup>-doped Y<sub>x</sub>Lu<sub>1−x</sub>NbO<sub>4</sub> (x = 0, 0.25, 0.5, 0.75, 1) were prepared by the solid-state reaction method. YNbO<sub>4</sub>:Eu<sup>3+</sup> and LuNbO<sub>4</sub>:Eu<sup>3+&...
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MDPI AG
2022-03-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/12/3/427 |
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| author | Milica Sekulić Tatjana Dramićanin Aleksandar Ćirić Ljubica Đačanin Far Miroslav D. Dramićanin Vesna Đorđević |
| author_facet | Milica Sekulić Tatjana Dramićanin Aleksandar Ćirić Ljubica Đačanin Far Miroslav D. Dramićanin Vesna Đorđević |
| author_sort | Milica Sekulić |
| collection | DOAJ |
| description | Eu<sup>3+</sup>-doped Y<sub>x</sub>Lu<sub>1−x</sub>NbO<sub>4</sub> (x = 0, 0.25, 0.5, 0.75, 1) were prepared by the solid-state reaction method. YNbO<sub>4</sub>:Eu<sup>3+</sup> and LuNbO<sub>4</sub>:Eu<sup>3+</sup> crystallize as beta-Fergusonite (SG no. 15) in 1–10 μm diameter particles. Photoluminescence emission spectra show a slight linear variation of emission energies and intensities with the solid-solution composition in terms of Y/Lu content. The energy difference between Stark sublevels of <sup>5</sup>D<sub>0</sub>→<sup>7</sup>F<sub>1</sub> emission increases, while the asymmetry ratio decreases with the composition. From the dispersion relations of pure YNbO<sub>4</sub> and LuNbO<sub>4</sub>, the refractive index values for each concentration and emission wavelength are estimated. The Ω<sub>2</sub> Judd–Ofelt parameter shows a linear increase from 6.75 to 7.48 × 10<sup>−20</sup> cm<sup>2</sup> from x = 0 to 1, respectively, and Ω<sub>4</sub> from 2.69 to 2.95 × 10<sup>−20</sup> cm<sup>2</sup>. The lowest non-radiative deexcitation rate was observed with x = 1, and thus LuNbO<sub>4</sub>:Eu<sup>3+</sup> is more efficient phosphor than YNbO<sub>4</sub>:Eu<sup>3+</sup>. |
| first_indexed | 2024-03-09T13:47:02Z |
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| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T13:47:02Z |
| publishDate | 2022-03-01 |
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| spelling | doaj.art-4fd3037a4f4d4bfe8d289f74cb1bf8c02023-11-30T20:58:05ZengMDPI AGCrystals2073-43522022-03-0112342710.3390/cryst12030427Photoluminescence of the Eu<sup>3+</sup>-Activated Y<sub>x</sub>Lu<sub>1−x</sub>NbO<sub>4</sub> (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution PhosphorsMilica Sekulić0Tatjana Dramićanin1Aleksandar Ćirić2Ljubica Đačanin Far3Miroslav D. Dramićanin4Vesna Đorđević5Center of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522 Belgrade, SerbiaCenter of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522 Belgrade, SerbiaCenter of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522 Belgrade, SerbiaCenter of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522 Belgrade, SerbiaCenter of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522 Belgrade, SerbiaCenter of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522 Belgrade, SerbiaEu<sup>3+</sup>-doped Y<sub>x</sub>Lu<sub>1−x</sub>NbO<sub>4</sub> (x = 0, 0.25, 0.5, 0.75, 1) were prepared by the solid-state reaction method. YNbO<sub>4</sub>:Eu<sup>3+</sup> and LuNbO<sub>4</sub>:Eu<sup>3+</sup> crystallize as beta-Fergusonite (SG no. 15) in 1–10 μm diameter particles. Photoluminescence emission spectra show a slight linear variation of emission energies and intensities with the solid-solution composition in terms of Y/Lu content. The energy difference between Stark sublevels of <sup>5</sup>D<sub>0</sub>→<sup>7</sup>F<sub>1</sub> emission increases, while the asymmetry ratio decreases with the composition. From the dispersion relations of pure YNbO<sub>4</sub> and LuNbO<sub>4</sub>, the refractive index values for each concentration and emission wavelength are estimated. The Ω<sub>2</sub> Judd–Ofelt parameter shows a linear increase from 6.75 to 7.48 × 10<sup>−20</sup> cm<sup>2</sup> from x = 0 to 1, respectively, and Ω<sub>4</sub> from 2.69 to 2.95 × 10<sup>−20</sup> cm<sup>2</sup>. The lowest non-radiative deexcitation rate was observed with x = 1, and thus LuNbO<sub>4</sub>:Eu<sup>3+</sup> is more efficient phosphor than YNbO<sub>4</sub>:Eu<sup>3+</sup>.https://www.mdpi.com/2073-4352/12/3/427phosphorEu<sup>3+</sup>niobatesJudd-Ofeltquantum efficiencyrefractive index |
| spellingShingle | Milica Sekulić Tatjana Dramićanin Aleksandar Ćirić Ljubica Đačanin Far Miroslav D. Dramićanin Vesna Đorđević Photoluminescence of the Eu<sup>3+</sup>-Activated Y<sub>x</sub>Lu<sub>1−x</sub>NbO<sub>4</sub> (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors Crystals phosphor Eu<sup>3+</sup> niobates Judd-Ofelt quantum efficiency refractive index |
| title | Photoluminescence of the Eu<sup>3+</sup>-Activated Y<sub>x</sub>Lu<sub>1−x</sub>NbO<sub>4</sub> (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors |
| title_full | Photoluminescence of the Eu<sup>3+</sup>-Activated Y<sub>x</sub>Lu<sub>1−x</sub>NbO<sub>4</sub> (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors |
| title_fullStr | Photoluminescence of the Eu<sup>3+</sup>-Activated Y<sub>x</sub>Lu<sub>1−x</sub>NbO<sub>4</sub> (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors |
| title_full_unstemmed | Photoluminescence of the Eu<sup>3+</sup>-Activated Y<sub>x</sub>Lu<sub>1−x</sub>NbO<sub>4</sub> (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors |
| title_short | Photoluminescence of the Eu<sup>3+</sup>-Activated Y<sub>x</sub>Lu<sub>1−x</sub>NbO<sub>4</sub> (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors |
| title_sort | photoluminescence of the eu sup 3 sup activated y sub x sub lu sub 1 x sub nbo sub 4 sub x 0 0 25 0 5 0 75 1 solid solution phosphors |
| topic | phosphor Eu<sup>3+</sup> niobates Judd-Ofelt quantum efficiency refractive index |
| url | https://www.mdpi.com/2073-4352/12/3/427 |
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