Novel Red Phosphor of Gd3+, Sm3+ co-Activated AgxGd((2−x)/3)−0.3−ySmyEu3+0.30☐(1−2x−2y)/3WO4 Scheelites for LED Lighting
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Novel Red Phosphor of Gd3+, Sm3+ co-Activated AgxGd((2−x)/3)−0.3−ySmyEu3+0.30☐(1−2x−2y)/3WO4 Scheelites for LED Lighting
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| Автор |
Morozov, V. A.
Lazoryak, B. I. Savina, A. A. Khaikina, E. G. Leonidov, I. I. Ishchenko, A. V. Deyneko, D. V. |
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| Тематика |
EUROPIUM
GADOLINIUM INCOMMENSURATELY MODULATED STRUCTURES LUMINESCENCE PHOSPHORS SAMARIUM SCHEELITE SILVER TUNGSTATES WHITE LIGHT-EMITTING DIODES CHARGE TRANSFER CHEMICAL ACTIVATION EMISSION SPECTROSCOPY EUROPIUM GADOLINIUM GALLIUM NITRIDE III-V SEMICONDUCTORS LIGHT EMITTING DIODES LUMINESCENCE OF INORGANIC SOLIDS PHOSPHORS PHOTOLUMINESCENCE POSITIVE IONS SAMARIUM TUNGSTATE MINERALS CO ACTIVATION CO-ACTIVATION GADOLINIA INCOMMENSURATELY MODULATED STRUCTURE LUMINESCENCE PROPERTIES MODULATED STRUCTURES SCHEELITE SYNTHESISED TUNGSTATE WHITE LIGHT EMITTING DIODES SILVER |
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| Описание |
Gd3+ and Sm3+ co-activation, the effect of cation substitutions and the creation of cation vacancies in the scheelite-type framework are investigated as factors influencing luminescence properties. AgxGd((2−x)/3)−0.3−ySmyEu3+0.3☐(1−2x)/3WO4 (x = 0.50, 0.286, 0.20; y = 0.01, 0.02, 0.03, 0.3) scheelite-type phases (AxGSyE) have been synthesized by a solid-state method. A powder X-ray diffraction study of AxGSyE (x = 0.286, 0.2; y = 0.01, 0.02, 0.03) shows that the crystal structures have an incommensurately modulated character similar to other cation-deficient scheelite-related phases. Luminescence properties have been evaluated under near-ultraviolet (n–UV) light. The photoluminescence excitation spectra of AxGSyE demonstrate the strongest absorption at 395 nm, which matches well with commercially available UV-emitting GaN-based LED chips. Gd3+ and Sm3+ co-activation leads to a notable decreasing intensity of the charge transfer band in comparison with Gd3+ single-doped phases. The main absorption is the 7F0 → 5L6 transition of Eu3+ at 395 nm and the 6H5/2 → 4F7/2 transition of Sm3+ at 405 nm. The photoluminescence emission spectra of all the samples indicate intense red emission due to the 5D0 → 7F2 transition of Eu3+. The intensity of the 5D0 → 7F2 emission increases from ~2 times (x = 0.2, y = 0.01 and x = 0.286, y = 0.02) to ~4 times (x = 0.5, y = 0.01) in the Gd3+ and Sm3+ co-doped samples. The integral emission intensity of Ag0.20Gd0.29Sm0.01Eu0.30WO4 in the red visible spectral range (the 5D0 → 7F2 transition) is higher by ~20% than that of the commercially used red phosphor of Gd2O2S:Eu3+. A thermal quenching study of the luminescence of the Eu3+ emission reveals the influence of the structure of compounds and the Sm3+ concentration on the temperature dependence and behavior of the synthesized crystals. Ag0.286Gd0.252Sm0.02Eu0.30WO4 and Ag0.20Gd0.29Sm0.01Eu0.30WO4, with the incommensurately modulated (3 + 1)D monoclinic structure, are very attractive as near-UV converting phosphors applied as red-emitting phosphors for LEDs. © 2023 by the authors.
AAAA-A21-121011590086-0; Ministry of Education and Science of the Russian Federation, Minobrnauka: 0273-2021-0008, FEUZ–2023–0014; Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, ISSC UB RAS; 122011300125-2 The study was supported by the Development Program of the Interdisciplinary Scientific and Educational School of Lomonosov Moscow State University’s “The future of the planet and global environmental change”, and the state assignment of the Chemistry Department of Moscow State University (Agreement No. AAAA-A21-121011590086-0) and state of the Russian Federation (122011300125-2). A.A.S. and E.G.K. are grateful to the support from the Ministry of Science and Higher Education of the Russian Federation (project No. 0273-2021-0008). A.V.I. is grateful to the scientific project of the Ministry of Education and Science of the Russian Federation FEUZ–2023–0014. I.I.L. acknowledges the support from the Research Program No. AAAA–A19–119031890025–9 (ISSC UB RAS). |
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| Дата |
2024-04-05T16:27:04Z
2024-04-05T16:27:04Z 2023 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) |info:eu-repo/semantics/publishedVersion |
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| Идентификатор |
Morozov, VA, Lazoryak, BI, Savina, AA, Khaikina, EG, Leonidov, II, Ishchenko, AV & Deyneko, DV 2023, 'Novel Red Phosphor of Gd3+, Sm3+ co-Activated AgxGd((2−x)/3)−0.3−ySmyEu3+0.30☐(1−2x−2y)/3WO4 Scheelites for LED Lighting', Materials, Том. 16, № 12, 4350. https://doi.org/10.3390/ma16124350
Morozov, V. A., Lazoryak, B. I., Savina, A. A., Khaikina, E. G., Leonidov, I. I., Ishchenko, A. V., & Deyneko, D. V. (2023). Novel Red Phosphor of Gd3+, Sm3+ co-Activated AgxGd((2−x)/3)−0.3−ySmyEu3+0.30☐(1−2x−2y)/3WO4 Scheelites for LED Lighting. Materials, 16(12), [4350]. https://doi.org/10.3390/ma16124350 1996-1944 Final All Open Access, Gold, Green https://www.scopus.com/inward/record.uri?eid=2-s2.0-85163836662&doi=10.3390%2fma16124350&partnerID=40&md5=63616c0433115881cba7a84bd80f92dc https://www.mdpi.com/1996-1944/16/12/4350/pdf?version=1686640142 http://elar.urfu.ru/handle/10995/130601 10.3390/ma16124350 85163836662 001017399200001 |
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| Язык |
en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
cc-by https://creativecommons.org/licenses/by/4.0/ |
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application/pdf
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| Издатель |
MDPI
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| Источник |
Materials
Materials |
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