Crystallographic and Judd-Ofelt Parametric investigation into Ca9Bi(VO4)7:Eu3+ nanophosphor for NUV-WLEDs

Phogat, Priya; Khatkar, S.P.; Malik, R.K.; Dalal, Jyoti; Hooda, Anju; Taxak, V.B.

doi:10.1016/j.jlumin.2021.117984

Cited by 42 publications

(8 citation statements)

References 46 publications

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“…Another promising method is based on the use of blue, green, and red phosphors stimulated by the near-ultraviolet (near-UV) LED chips. To create high-quality phosphors with excellent photoluminescence (PL) properties, a significant amount of effort has been devoted to the fabrication of different host systems [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Multi‐color luminescence of Sm³⁺‐doped Na₂YMg₂V₃O₁₂ phosphor potentially applicable in white‐LEDs

et al. 2023

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A novel multi‐color emitting Na2YMg2V3O12:Sm3+ phosphor was synthesized using a solid‐state reaction, and its crystal structure, luminescence properties, and thermal stability were studied. Charge transfer within the (VO4)3− groups in the Na2YMg2V3O12 host led to a broad emission band between 400 and 700 nm, with a maximum at 530 nm. The Na2Y1−xMg2V3O12:xSm3+ phosphors exhibited a multi‐color emission band under 365 nm near‐ultraviolet (near‐UV) light, consisting of the green emission of the (VO4)3− groups and sharp emission peaks at 570 nm (yellow), 618 nm (orange), 657 nm (red), and 714 nm (deep red) of Sm3+ ions. The optimal doping concentration of Sm3+ ions was found to be 0.05 mol%, and the dipole–dipole (d–d) interaction was primarily responsible for the concentration quenching phenomenon. Using the acquired Na2YMg2V3O12:Sm3+ phosphors, commercial BaMgAl10O17:Eu2+ blue phosphor, and a near‐UV light‐emitting diode (LED) chip, a white‐LED lamp was designed and packaged. It produced bright neutral white light, manifesting a CIE coordinate of (0.314, 0.373), a color rendering index (CRI) of 84.9, and a correlated color temperature (CCT) of 6377 K. These findings indicate the potential of Na2YMg2V3O12:Sm3+ phosphor to be used as a multi‐color component for solid‐state illumination.

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Section: Introductionmentioning

confidence: 99%

Multi‐color luminescence of Sm³⁺‐doped Na₂YMg₂V₃O₁₂ phosphor potentially applicable in white‐LEDs

et al. 2023

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“…The prominent nearly 610 nm emission corresponding to the 5 D 0 → 7 F 2 transition (electric dipole transition) of the Eu 3+ , lacking the centrosymmetric site occupation is beneficial to the enhancement of phosphor color purity (CP). 17 The tetragonal zircon-type LnVO 4 (Ln = Y, La, and Gd) host has been extensively explored as a luminescence matrix, and the YVO 4 :Eu 3+ red phosphor has been deployed in highpressure mercury lamps, plasma flat-panel displays, and other applications. 18,19 Furthermore, vanadates with suitable compositions can be used for white light-generating phosphors.…”

Section: Introductionmentioning

confidence: 99%

“…The Eu 3+ ion is a well‐known activator for synthesizing efficient red phosphors, and it has been extensively studied due to the distinctive red emissions produced by the 5 D 0 → 7 F J ( J = 0, 1, 2, 3, 4) transitions. The prominent nearly 610 nm emission corresponding to the 5 D 0 → 7 F 2 transition (electric dipole transition) of the Eu 3+ , lacking the centrosymmetric site occupation is beneficial to the enhancement of phosphor color purity (CP) 17 . The tetragonal zircon‐type LnVO 4 (Ln = Y, La, and Gd) host has been extensively explored as a luminescence matrix, and the YVO 4 :Eu 3+ red phosphor has been deployed in high‐pressure mercury lamps, plasma flat‐panel displays, and other applications 18,19 .…”

Section: Introductionmentioning

confidence: 99%

Structural characterization, energy transfer, and Judd–Ofelt analysis of pure and the Eu³⁺‐doped Ca₂LiMg₂V₃O₁₂ phosphors

Princy,

Annie Rathnakumari,

Masilla Moses Kennedy

2023

J Am Ceram Soc.

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A novel vanadate host Ca 2 LiMg 2 V 3 O 12 (CLMV) and the Eu 3+ -doped samples were synthesized via a solid-state reaction method. The phase formation and the morphological analysis were studied in detail. The Rietveld refinement result shows that the host belongs to cubic space group Ia-3d (230) with lattice parameter, a = 12.3948 Å, V = 1904.23 Å 3 , and Z = 8. The diffuse reflectance spectroscopy measurement estimated the bandgap of the host and the CLMV:0.05Eu 3+ phosphors. The host exhibits a broad absorption band (peak at 345 nm) ranging from 240 to 380 nm, which is attributed to the charge transfer in the O 2− -V 5+ complex. Under near UV excitation (λ exc = 345 nm), the host gives a broad emission band covering the visible region from 400 to 730 nm and the emission is in the bluish-green region of the CIE diagram. When the host is doped with the Eu 3+ ions and excited at 345 nm, the emission spectrum depicts the superimposition of the characteristic emission bands (red emission) of the Eu 3+ ions corresponding to the f-f transitions over the broad emission band of the host. The calculated color coordinates (9600 to 2280 K) demonstrated the color tuning ability of the phosphor as the dopant concentration is increased in the host. This is because the VO 4 3− group plays the sensitiser role and partially transfers energy with the Eu 3+ ions. When the same set of phosphors were excited at the dominant characteristic excitation band (λ exc = 394 nm) of the Eu 3+ , the characteristic emission bands of the Eu 3+ in the orange-red region were observed. As the electric dipole transition of the Eu 3+ was found to be dominant, the prepared phosphors possessed high color purity (CP). The energy transfer mechanism and the lifetime values were also presented. The temperature-dependent PL studies showed good thermal stability of the optimum sample. Various radiative transition properties were analyzed by the Judd-Ofelt theory. The photometric results reveal the color tuning ability and CP of the CLMV:xEu 3+ phosphors.

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“…A considerable number of studies have been conducted on the development of various luminescent compounds such as luminescent organic dyes, [1][2][3][4] metal complexes, [5][6][7] and inorganic compounds (nanoparticles and ceramics). [8][9][10][11][12][13][14][15] Recently, Hatakeyama et al successfully prepared a blue luminescent boron-based organic dye with high color purity (full-width at half-maximum (FWHM) of 28 nm) for the fabrication of efficient organic light emitting diodes (LEDs). 16 Jang et al prepared InP/ZnSe/ZnS quantum dots exhibiting strong red luminescence with high color purity (FWHM of 35 nm).…”

Section: Introductionmentioning

confidence: 99%

Bright red emission with high color purity from Eu(iii) complexes with π-conjugated polycyclic aromatic ligands and their sensing applications

2022

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Crystallographic and Judd-Ofelt Parametric investigation into Ca9Bi(VO4)7:Eu3+ nanophosphor for NUV-WLEDs

Cited by 42 publications

References 46 publications

Multi‐color luminescence of Sm³⁺‐doped Na₂YMg₂V₃O₁₂ phosphor potentially applicable in white‐LEDs

Multi‐color luminescence of Sm³⁺‐doped Na₂YMg₂V₃O₁₂ phosphor potentially applicable in white‐LEDs

Structural characterization, energy transfer, and Judd–Ofelt analysis of pure and the Eu³⁺‐doped Ca₂LiMg₂V₃O₁₂ phosphors

Bright red emission with high color purity from Eu(iii) complexes with π-conjugated polycyclic aromatic ligands and their sensing applications

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Crystallographic and Judd-Ofelt Parametric investigation into Ca9Bi(VO4)7:Eu3+ nanophosphor for NUV-WLEDs

Cited by 42 publications

References 46 publications

Multi‐color luminescence of Sm3+‐doped Na2YMg2V3O12 phosphor potentially applicable in white‐LEDs

Multi‐color luminescence of Sm3+‐doped Na2YMg2V3O12 phosphor potentially applicable in white‐LEDs

Structural characterization, energy transfer, and Judd–Ofelt analysis of pure and the Eu3+‐doped Ca2LiMg2V3O12 phosphors

Bright red emission with high color purity from Eu(iii) complexes with π-conjugated polycyclic aromatic ligands and their sensing applications

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Product

Resources

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Multi‐color luminescence of Sm³⁺‐doped Na₂YMg₂V₃O₁₂ phosphor potentially applicable in white‐LEDs

Multi‐color luminescence of Sm³⁺‐doped Na₂YMg₂V₃O₁₂ phosphor potentially applicable in white‐LEDs

Structural characterization, energy transfer, and Judd–Ofelt analysis of pure and the Eu³⁺‐doped Ca₂LiMg₂V₃O₁₂ phosphors