Synthesis and enhanced luminescence properties of double perovskite NaLa0.95−xYxEu0.05MgWO6 phosphors

Zhang, Jing; Shen, Jialin; Ni, Xiaobo

doi:10.1007/s12598-019-01233-2

Cited by 15 publications

(4 citation statements)

References 29 publications

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“…They suggested that the Eu 3+ in the asymmetry site of SrWO 4 plays a crucial role in the PL activity of the material. Following that numerous literature are available in the activator Eu 3+ doped phosphor material for red emission to various opto-electronics device applications [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Red emitting Eu³⁺ induced SrWO₄ materials: synthesis, structural, morphological and photoluminescence analysis

et al. 2021

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Rare-earth doped phosphors have occupied significant percentage in the field of luminescence applications. In order to get the optimized intensity of PL spectra, the dopant selection, dopant concentration and preparation technique plays a major role. In this work, SrWO 4 and Eu 3+ doped SrWO 4 were successfully synthesized via fuel assisted solid state reaction technique at a temperature of 900 °C. The effect of Eu concentration on SrWO 4 was analyzed by X-ray diffraction, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and PL spectroscopy. All the diffraction peaks of prepared SrWO 4 and Sr 1−x Eu x WO 4 (x=0.01, 0.02, 0.03, 0.04 and 0.05) were well-matched with the standard tetragonal phase of SrWO 4 . In the PL study, SrWO 4 :Eu 3+ shows the characteristics emission peaks at 5 D 0 → 7 F J (J=1, 2, 3, 4) transitions for Eu 3+ . 5 D 0 → 7 F 2 (615 nm) is predominant at 394 nm excitation wavelength. The PL emission intensity at 615 nm gradually increases upto 4% of Eu 3+ and then decreases. Using XPS, the chemical state analysis was carried out in Sr 1−x Eu x WO 4 (x=0.04) and Eu dopant is in 3+oxidation state. The electron density distribution analysis in the unit cell was carried using the maximum entropy method (MEM) and their charge derived properties were correlated with the PL analysis. Based on the different characterization analysis, Eu 3+ doped SrWO 4 act as an efficient red-emitting phosphor for Near UV (394 nm excitation), blue LED (450 nm excitation) based white LED and FED applications.

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Section: Introductionmentioning

confidence: 99%

Red emitting Eu³⁺ induced SrWO₄ materials: synthesis, structural, morphological and photoluminescence analysis

et al. 2021

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“…It was found that only NH 4 Eu(MoO 4 ) 2 and NH 4 Tb(MoO 4 ) 2 are luminescent across the series of NH 4 Ln(MoO 4 ) 2 compounds, and Figure a,b, respectively, show their excitation (photoluminescence excitation (PLE)) and emission (PL) spectra. The PLE of NH 4 Eu(MoO 4 ) 2 , obtained by monitoring the 615 nm ( 5 D 0 → 7 F 2 ) main emission of Eu 3+ , presented a broad band ranging from 200 to 350 nm (centered at ∼278 nm) for O 2– → Mo 6+ /Eu 3+ charge transfer (CT) and sharp lines at ∼362, 382, 395, 417, and 465 nm for 7 F 0 → 5 D 4 , 5 L 7 , 5 L 6 , 5 D 3 , and 5 D 2 intra-4f 6 transitions of Eu 3+ , respectively (Figure a). , Under a 395 nm excitation, the typical 5 D 0 → 7 F J ( J = 1–4) transitions of Eu 3+ were observed in the 500–750 nm region, with the 5 D 0 → 7 F 2 red emission at 615 nm being predominant (Figure a). This conforms to the low site symmetry ( C 2 ) of Eu 3+ in the orthorhombic lattice.…”

Section: Resultsmentioning

confidence: 99%

“…As shown in Figure 8a , presented a broad band ranging from 200 to 350 nm (centered at ∼278 nm) for O 2− → Mo 6+ /Eu 3+ charge transfer (CT) and sharp lines at ∼362, 382, 395, 417, and 465 nm for 7 F 0 → 5 D 4 , 5 L 7 , 5 L 6 , 5 D 3 , and 5 D 2 intra-4f 6 transitions of Eu 3+ , respectively (Figure 9a). 36,37 Under a 395 nm excitation, the typical 5 D 0 → 7 F J (J = 1−4) transitions of Eu 3+ were observed in the 500− 750 nm region, with the 5 D 0 → 7 F 2 red emission at 615 nm being predominant (Figure 9a). This conforms to the low site symmetry (C 2 ) of Eu 3+ in the orthorhombic lattice.…”

Section: Derivation Viamentioning

confidence: 99%

Systematic Crystallization of NH₄Ln(MoO₄)₂ as a Family of Layered Compounds (Ln = La–Lu and Y), Derivation of Ln₂Mo₄O₁₅, Crystal Structure, and Photoluminescence

Zhu

et al. 2022

Inorg. Chem.

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NH 4 Ln(MoO 4 ) 2 (Ln = La−Lu lanthanide, Y) was crystallized via hydrothermal reaction as a new family of layered materials, from which phase-pure Ln 2 Mo 4 O 15 was successfully derived via subsequent annealing at 700 °C for the series of Ln elements excluding Ce and Lu. Detailed structure analysis revealed that the ionic size of Ln 3+ decisively determined the crystal structure and Mo/Ln coordination for the two families of compounds. NH 4 Ln(MoO 4 ) 2 was analyzed to be orthorhombic (Pbcn space group, no. 60) and monoclinic (P2/c, no. 13) for the larger and smaller Ln 3+ of Ln = La−Gd and Ln = Tb−Lu (including Y), respectively, where both the crystal structures have a layered topology featured by the alternative stacking of a [Ln(MoO 4 ) 2 ] − three-tier infinite anionic layer and interlayer NH 4 + . Four types of crystal structures were found for the Ln 2 Mo 4 O 15 series, which are monoclinic (P2 1 /a, no. 14) for Ln = La, triclinic (P1̅ , no. 2) for Ln = Pr−Sm, triclinic (P1̅ , no. 2) for Ln = Eu and Gd, and monoclinic (P2 1 /c, no. 14) for Ln = Tb−Yb (including Y). The photoluminescence of NH 4 Ln(MoO 4 ) 2 (Ln = Eu, Tb) and Ln 2 Mo 4 O 15 :Eu 3+ (Ln = La, Gd, Y) was thoroughly investigated in terms of spectral features, quantum efficiency, fluorescence decay, and CIE chromaticity. The thermal stability of luminescence was also studied for Ln 2 Mo 4 O 15 :Eu 3+ , and the observed charge-transfer excitation components were successfully correlated with the features of the Mo−O polyhedron/unit.

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“…In particular, white LEDs (WLEDs) appear to be the next-generation lighting devices due to their good stability and high electroconversion efficiency. [1,2] Most of these WLEDs consist of a blue LED chip with a yellow-emitting garnet YAG:Ce 3+ . [3][4][5] A highly correlated colour temperature (CCT) and low colour rendering index (CRI) are the causes of the deficiency in the red component in YAG LEDs.…”

Section: Introductionmentioning

confidence: 99%

Europium doped Sr₂YNbO₆ double perovskite phosphor for photoluminescence and thermoluminescence properties

et al. 2023

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A luminescent double perovskite phosphor Sr 2 YNbO 6 doped with Eu 3+ crystallized to the monoclinic phase and was synthesized successfully via a conventional hightemperature combustion method. The formation of the crystal structure, phase purity, and surface morphology were studied using X-ray diffraction patterns and scanning electron microscopy. The characteristic vibrations between the atoms of the functional groups present in phosphor were studied using Fourier transform infrared spectra analysis. The luminescence properties of the prepared phosphors were investigated in terms of photoluminescence (PL) and thermoluminescence (TL).PL excitation spectra exhibited charge transfer bands and the characteristic 4f 6 transitions of Eu 3+ . A prominent PL emission was obtained for the phosphor doped with 4 mol% Eu 3+ under the 396 nm excitation wavelength. PL emission quenching was

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Synthesis and enhanced luminescence properties of double perovskite NaLa0.95−xYxEu0.05MgWO6 phosphors

Cited by 15 publications

References 29 publications

Red emitting Eu³⁺ induced SrWO₄ materials: synthesis, structural, morphological and photoluminescence analysis

Red emitting Eu³⁺ induced SrWO₄ materials: synthesis, structural, morphological and photoluminescence analysis

Systematic Crystallization of NH₄Ln(MoO₄)₂ as a Family of Layered Compounds (Ln = La–Lu and Y), Derivation of Ln₂Mo₄O₁₅, Crystal Structure, and Photoluminescence

Europium doped Sr₂YNbO₆ double perovskite phosphor for photoluminescence and thermoluminescence properties

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Synthesis and enhanced luminescence properties of double perovskite NaLa0.95−xYxEu0.05MgWO6 phosphors

Cited by 15 publications

References 29 publications

Red emitting Eu3+ induced SrWO4 materials: synthesis, structural, morphological and photoluminescence analysis

Red emitting Eu3+ induced SrWO4 materials: synthesis, structural, morphological and photoluminescence analysis

Systematic Crystallization of NH4Ln(MoO4)2 as a Family of Layered Compounds (Ln = La–Lu and Y), Derivation of Ln2Mo4O15, Crystal Structure, and Photoluminescence

Europium doped Sr2YNbO6 double perovskite phosphor for photoluminescence and thermoluminescence properties

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Red emitting Eu³⁺ induced SrWO₄ materials: synthesis, structural, morphological and photoluminescence analysis

Red emitting Eu³⁺ induced SrWO₄ materials: synthesis, structural, morphological and photoluminescence analysis

Systematic Crystallization of NH₄Ln(MoO₄)₂ as a Family of Layered Compounds (Ln = La–Lu and Y), Derivation of Ln₂Mo₄O₁₅, Crystal Structure, and Photoluminescence

Europium doped Sr₂YNbO₆ double perovskite phosphor for photoluminescence and thermoluminescence properties