Emission color tunability of dysprosium-activated YNbO4–LuNbO4-mixed phosphors
Само за регистроване кориснике
2024
Аутори
Đačanin-Far, LjubicaDramićanin, Tatjana
Medić, Mina
Ristić, Zoran
Periša, Jovana
Đorđević, Vesna
Antić, Željka
Dramićanin, Miroslav
Чланак у часопису (Објављена верзија)
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Herein, we demonstrate the photoluminescence properties of Dy3+-activated YNbO4, LuNbO4, and mixed YxLu1−xNbO4:Dy3+ (x=0.25, 0.5, 0.75) phosphors. For this purpose, fve samples with a fxed Dy3+ concentration (2 mol%) were prepared by the solid-state reaction method. X-ray difraction measurements showed that all phosphors crystallize in a monoclinic fergusonite-beta-(Y) structure with a C2/c space group. Scanning electron microscopy clearly shows that samples are composed of dense, well-developed micron-sized, cube-shaped grains with rounded edges. The photoluminescent emission spectra feature Dy3+ peaks at standard positions corresponding to transitions from the 4 F9/2 excited emitting level to the 6 HJ (J=15/2; 13/2; 11/2 and 9/2) lower levels with two dominant emission bands placed in the blue (~479 nm, B) and yellow (~576 nm, Y) spectral region. It is observed that with Lu increase in the host lattice Y/B ratio decreases toward the desired ratio of unity to obtain white light. To ev...aluate the suitability of these phosphors for use in solid-state lighting, their photoluminescence emission was analyzed in detail by calculating CIE coordinates, correlated color temperature (CCT) and Delta u,v (DUV). It is shown that CIE chromaticity coordinates of all Dy3+-activated YxLu1−xNbO4 samples (x=0, 0.25, 0.5, 0.75, and 1) fall into the white portion of the diagram and that with the increase of Lu in the host lattice color becomes whiter. CCT values for all samples are in the cooler 4000–4500 K range with positive DUVs indicating that color points are placed above the black body curve. The average lifetime of 4 F9/2 level is calculated to be~0.2 ms for all Dy3+-activated YxLu1−xNbO4 samples, indicating that there is no infuence of the Y-to-Lu ratio in the host niobate material on the luminescence kinetics.
Кључне речи:
Phosphors / Dy3+ / Niobates / CIE coordinatesИзвор:
Applied Physics A, 2024, 130, 2, 107-Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200017 (Универзитет у Београду, Институт за нуклеарне науке Винча, Београд-Винча) (RS-MESTD-inst-2020-200017)
Колекције
Институција/група
VinčaTY - JOUR AU - Đačanin-Far, Ljubica AU - Dramićanin, Tatjana AU - Medić, Mina AU - Ristić, Zoran AU - Periša, Jovana AU - Đorđević, Vesna AU - Antić, Željka AU - Dramićanin, Miroslav PY - 2024 UR - https://vinar.vin.bg.ac.rs/handle/123456789/12568 AB - Herein, we demonstrate the photoluminescence properties of Dy3+-activated YNbO4, LuNbO4, and mixed YxLu1−xNbO4:Dy3+ (x=0.25, 0.5, 0.75) phosphors. For this purpose, fve samples with a fxed Dy3+ concentration (2 mol%) were prepared by the solid-state reaction method. X-ray difraction measurements showed that all phosphors crystallize in a monoclinic fergusonite-beta-(Y) structure with a C2/c space group. Scanning electron microscopy clearly shows that samples are composed of dense, well-developed micron-sized, cube-shaped grains with rounded edges. The photoluminescent emission spectra feature Dy3+ peaks at standard positions corresponding to transitions from the 4 F9/2 excited emitting level to the 6 HJ (J=15/2; 13/2; 11/2 and 9/2) lower levels with two dominant emission bands placed in the blue (~479 nm, B) and yellow (~576 nm, Y) spectral region. It is observed that with Lu increase in the host lattice Y/B ratio decreases toward the desired ratio of unity to obtain white light. To evaluate the suitability of these phosphors for use in solid-state lighting, their photoluminescence emission was analyzed in detail by calculating CIE coordinates, correlated color temperature (CCT) and Delta u,v (DUV). It is shown that CIE chromaticity coordinates of all Dy3+-activated YxLu1−xNbO4 samples (x=0, 0.25, 0.5, 0.75, and 1) fall into the white portion of the diagram and that with the increase of Lu in the host lattice color becomes whiter. CCT values for all samples are in the cooler 4000–4500 K range with positive DUVs indicating that color points are placed above the black body curve. The average lifetime of 4 F9/2 level is calculated to be~0.2 ms for all Dy3+-activated YxLu1−xNbO4 samples, indicating that there is no infuence of the Y-to-Lu ratio in the host niobate material on the luminescence kinetics. T2 - Applied Physics A T1 - Emission color tunability of dysprosium-activated YNbO4–LuNbO4-mixed phosphors VL - 130 IS - 2 SP - 107 DO - 10.1007/s00339-023-07271-z ER -
@article{ author = "Đačanin-Far, Ljubica and Dramićanin, Tatjana and Medić, Mina and Ristić, Zoran and Periša, Jovana and Đorđević, Vesna and Antić, Željka and Dramićanin, Miroslav", year = "2024", abstract = "Herein, we demonstrate the photoluminescence properties of Dy3+-activated YNbO4, LuNbO4, and mixed YxLu1−xNbO4:Dy3+ (x=0.25, 0.5, 0.75) phosphors. For this purpose, fve samples with a fxed Dy3+ concentration (2 mol%) were prepared by the solid-state reaction method. X-ray difraction measurements showed that all phosphors crystallize in a monoclinic fergusonite-beta-(Y) structure with a C2/c space group. Scanning electron microscopy clearly shows that samples are composed of dense, well-developed micron-sized, cube-shaped grains with rounded edges. The photoluminescent emission spectra feature Dy3+ peaks at standard positions corresponding to transitions from the 4 F9/2 excited emitting level to the 6 HJ (J=15/2; 13/2; 11/2 and 9/2) lower levels with two dominant emission bands placed in the blue (~479 nm, B) and yellow (~576 nm, Y) spectral region. It is observed that with Lu increase in the host lattice Y/B ratio decreases toward the desired ratio of unity to obtain white light. To evaluate the suitability of these phosphors for use in solid-state lighting, their photoluminescence emission was analyzed in detail by calculating CIE coordinates, correlated color temperature (CCT) and Delta u,v (DUV). It is shown that CIE chromaticity coordinates of all Dy3+-activated YxLu1−xNbO4 samples (x=0, 0.25, 0.5, 0.75, and 1) fall into the white portion of the diagram and that with the increase of Lu in the host lattice color becomes whiter. CCT values for all samples are in the cooler 4000–4500 K range with positive DUVs indicating that color points are placed above the black body curve. The average lifetime of 4 F9/2 level is calculated to be~0.2 ms for all Dy3+-activated YxLu1−xNbO4 samples, indicating that there is no infuence of the Y-to-Lu ratio in the host niobate material on the luminescence kinetics.", journal = "Applied Physics A", title = "Emission color tunability of dysprosium-activated YNbO4–LuNbO4-mixed phosphors", volume = "130", number = "2", pages = "107", doi = "10.1007/s00339-023-07271-z" }
Đačanin-Far, L., Dramićanin, T., Medić, M., Ristić, Z., Periša, J., Đorđević, V., Antić, Ž.,& Dramićanin, M.. (2024). Emission color tunability of dysprosium-activated YNbO4–LuNbO4-mixed phosphors. in Applied Physics A, 130(2), 107. https://doi.org/10.1007/s00339-023-07271-z
Đačanin-Far L, Dramićanin T, Medić M, Ristić Z, Periša J, Đorđević V, Antić Ž, Dramićanin M. Emission color tunability of dysprosium-activated YNbO4–LuNbO4-mixed phosphors. in Applied Physics A. 2024;130(2):107. doi:10.1007/s00339-023-07271-z .
Đačanin-Far, Ljubica, Dramićanin, Tatjana, Medić, Mina, Ristić, Zoran, Periša, Jovana, Đorđević, Vesna, Antić, Željka, Dramićanin, Miroslav, "Emission color tunability of dysprosium-activated YNbO4–LuNbO4-mixed phosphors" in Applied Physics A, 130, no. 2 (2024):107, https://doi.org/10.1007/s00339-023-07271-z . .