Synthesis and Luminescence Investigation of Eu3+ Doped Ca2KZn2V3O12 Phosphors: A Potential Material for WLEDs Applications

Jeyakumaran, T.; Bharathi, N. Venkatesh; Sriramachandran, P.; Shanmugavel, R.; Ramaswamy, S.

doi:10.1007/s10904-020-01696-2

Cited by 18 publications

(6 citation statements)

References 34 publications

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“…The Ca 2 KZn 1.8 Eu 0.2 V 3 O 12 phosphor showed white emission with a CIE value that was close to white (0.3381, 0.3609), and the fabricated white LED showed reasonably good CRI and CCT values. 158 Eu 3+ -substituted CaBiVO 5 phosphor compositions showed color-tunable emission due to the host lattice emission, along with Eu 3+ red emission. Similarly, the effect of Li as a charge compensator in the Eu 3+ -doped Cd 2 V 2 O 7 phosphor was studied, and it was found that the selected phosphor compositions showed enhanced red emission.…”

Section: Eu3+ Based Phosphors With Scheelite and Double Perovskite Re...mentioning

confidence: 95%

Recent progress in trivalent europium (Eu³⁺)-based inorganic phosphors for solid-state lighting: an overview

Singh¹,

Pradhan²,

Priya³

et al. 2023

Dalton Trans.

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Section: Eu3+ Based Phosphors With Scheelite and Double Perovskite Re...mentioning

confidence: 95%

Recent progress in trivalent europium (Eu³⁺)-based inorganic phosphors for solid-state lighting: an overview

Singh¹,

Pradhan²,

Priya³

et al. 2023

Dalton Trans.

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“…In these systems, the Eu 3+ ions replace the Ca 2+ ions which are the dodecahedral sites of the garnet 37 . Along with the broad excitation band, a modest but distinct peak located at 394 nm (for λ emi = 610 nm, x = 0.01–0.09 mol) is due to the f–f transition ( 7 F 0 → 5 L 6 ) of the Eu 3+ ions 38 . Due to the extremely high absorption coefficient value (10 3 –10 5 cm −1 ) of the (VO 4 ) 3− tetrahedral group, the V–O bond absorption intensity is substantially greater than the f–f transition peak 39,40 .…”

Section: Resultsmentioning

confidence: 99%

“…37 Along with the broad excitation band, a modest but distinct peak located at 394 nm (for λ emi = 610 nm, x = 0.01-0.09 mol) is due to the f-f transition ( 7 F 0 → 5 L 6 ) of the Eu 3+ ions. 38 Due to the extremely high absorption coefficient value (10 3 -10 5 cm −1 ) of the (VO 4 ) 3− tetrahedral group, the V-O bond absorption intensity is substantially greater than the f-f transition peak. 39,40 The presence of the host absorption band while monitoring the dopant ion emission bands (610 nm of Eu 3+ ) is a sign of the existence of energy transfer from the host lattice (CLMV) to the dopant ions (Eu 3+ ).…”

Section: Photoluminescence Studiesmentioning

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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“… 76 It is well known that the most substantial peak of the electric dipole transition occurs at 5 D 0 → 7 F 2 (614 nm), which is highly sensitive to the symmetry and acceptor sites occupied by Eu 3+ ions in the host lattice. 77 When the Eu 3+ ions occupied the asymmetric center position, the 5 D 0 → 7 F 2 transition plays a critical role in the luminescent process and has more intensity than the other transitions. In contrast, the 5 D 0 → 7 F 1 magnetic dipole transition is more intense when the Eu 3+ is in the position of inversion symmetry.…”

Section: Resultsmentioning

confidence: 99%

A bacterial cellulose-based LiSrVO₄:Eu³⁺ nanosensor platform for smartphone sensing of levodopa and dopamine: point-of-care diagnosis of Parkinson's disease

Mahdavi¹,

Emadi²,

Nabavi³

2023

Nanoscale Adv.

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Synthesis and Luminescence Investigation of Eu3+ Doped Ca2KZn2V3O12 Phosphors: A Potential Material for WLEDs Applications

Cited by 18 publications

References 34 publications

Recent progress in trivalent europium (Eu³⁺)-based inorganic phosphors for solid-state lighting: an overview

Recent progress in trivalent europium (Eu³⁺)-based inorganic phosphors for solid-state lighting: an overview

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

A bacterial cellulose-based LiSrVO₄:Eu³⁺ nanosensor platform for smartphone sensing of levodopa and dopamine: point-of-care diagnosis of Parkinson's disease

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Synthesis and Luminescence Investigation of Eu3+ Doped Ca2KZn2V3O12 Phosphors: A Potential Material for WLEDs Applications

Cited by 18 publications

References 34 publications

Recent progress in trivalent europium (Eu3+)-based inorganic phosphors for solid-state lighting: an overview

Recent progress in trivalent europium (Eu3+)-based inorganic phosphors for solid-state lighting: an overview

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

A bacterial cellulose-based LiSrVO4:Eu3+ nanosensor platform for smartphone sensing of levodopa and dopamine: point-of-care diagnosis of Parkinson's disease

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Recent progress in trivalent europium (Eu³⁺)-based inorganic phosphors for solid-state lighting: an overview

Recent progress in trivalent europium (Eu³⁺)-based inorganic phosphors for solid-state lighting: an overview

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

A bacterial cellulose-based LiSrVO₄:Eu³⁺ nanosensor platform for smartphone sensing of levodopa and dopamine: point-of-care diagnosis of Parkinson's disease