Synthesis and photoluminescent characteristics of Dy3+doped Gd2O3phosphors

Jeena, T. R.; Raj, A. Moses Ezhil; Bououdina, M.

doi:10.1088/2053-1591/aa5336

Cited by 22 publications

(6 citation statements)

References 45 publications

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“…So, we are used LaB6 standard for instrumental broadening correction. The corrected broadening corresponding to the diffraction peak of CaFeO2.5 was estimated by using the relation [29,30]:…”

Section: Resultsmentioning

confidence: 99%

Effect of synthesis method on the structural behavior of CaFeO2.5 compound

Rihia¹,

Mahboub²,

Zeroual³

et al. 2022

Phys. Chem. Solid St.

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CaFeO2.5 samples were synthesized by solid solution, mirror furnace and Sol-gel methods. The effect of the synthesis method on the behavior structure was investigated. Phase structures are comparatively characterized and studied by means of X-ray powder diffraction. Experimental results have revealed that the synthesis method has a strong influence on the structure of the studied compounds. All samples obtained by the three methods are crystallized in the Pnma orthorhombic system. We obtained the best results in the case of the Sol-gel technique. In the Sol-gel method, the lattice parameters obtained are a=5.41631 Å, b= 14.73899 Å and c=5.58790 Å. Also, the value of the average crystallite size D=52.03 nm and the dislocation density δ=3.69x1010/cm². Since the values of the lattice parameters in this method were the smallest of the three methods, which exhibiting a weak shrink of the volume compared to the solid solution and mirror furnace one. This shrinking is a natural result of the decrease in the value of the average crystallite size and the increase of dislocation density, with a reason for the inverse relationship between them. This allows us to conclude the importance of the Sol-gel method for obtaining CaFeO2.5 nanoscale compound.

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Section: Resultsmentioning

confidence: 99%

Effect of synthesis method on the structural behavior of CaFeO2.5 compound

Rihia¹,

Mahboub²,

Zeroual³

et al. 2022

Phys. Chem. Solid St.

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“…The dominant blue emission indicates that Dy 3+ ions occupy the inversion symmetry site (high symmetry local sites) of the host lattice. [37][38][39][40][41][42][43][44][45] The dominant blue emission is favourable for the biomedical applications such as cell imaging as the excitation wavelength is in the visible region.…”

Section: Rietveld Refinementmentioning

confidence: 99%

Structural and optical properties of dysprosium‐doped hydroxyapatite nanoparticles and the use as a bioimaging probe in human cells

et al. 2022

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In this work, the hydroxyapatite nanoparticles doped with trivalent dysprosium ions were synthesized by a co-precipitation method. The characterization techniques such as X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX) were carried out to determine the crystalline and structural properties. The Rietveld structural refinement of the XRD patterns confirmed the purity of the phase formation of the synthesized nanoparticles. The photoluminescence emission spectra exhibited intense emissions in the blue region at 450 nm and 476 nm along with less intense yellow emission at 573 nm which can be attributed to the magnetic dipole and electric dipole transitions of dysprosium respectively. In order to evaluate the colour tunability of the emitted light CIE chromaticity coordinate values were calculated. The intense blue emissions from the synthesized sample were found to be favourable for bioimaging. The images obtained from the fluorescence microscopy revealed that the dysprosium-doped hydroxyapatite nanoparticles are potential bioimaging probes in human cells.

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“…Such an experience may be attributed to one' of the Quantum Mechanic rules that the location of rare earth ion at a high centosymmetric rate forbids the f-f levels of electric dipole transition [16,17]. In the photoluminescence spectra, broad peak can be seen in the yellow light emission region centred at 572 nm corresponding to the 4 F 9/2 to 6 H 13/2 transition of Dy 3+ ions [18,19]. Such a forced electric dipole transition is allowed only at low symmetries without any inversion centres in the host crystal structure, suggestive of dominant occupation of Dy 3+ at Ba 2+ sites.…”

Section: Photoluminescence Analysismentioning

confidence: 99%

“…Trivalent dysprosium (Dy 3+ ) with 4 F 9 electronic con guration, of all the RE ions, is an eminent candidate for visible spectral region between its f-f transitions [7]. The photoluminescence (PL) spectra of Dy 3+ ions comprising extended yellow emission in the 570-600 nm region is indicative of the transitions 4 F 9/2 → 6 H 15/2 levels [8]. These rare earth Dy 3+ ions as white light emitting sources with blue LEDs chip are a noteworthy electron trapping material and are used in mercury free luminescence lamps [9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Bi2+ ions on the photoluminescence properties of BaTiO3:Dy3+ perovskite phosphors for LEDs application

Arulmozhi

Vishista

Subalakshmi³

2021

Preprint

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A series of (Ba1-xBi0.01)TiO3 doped with Dy3+ ions of varying concentrations is prepared by single step solid state reaction that promulgates solid state lighting device applications. The cubic phase perovskite structure of the prepared samples is determined by the Powder X-ray diffraction results. The emission spectra show evidence of intensive peaks at 572 nm attributing to the 4F9/2 to 6H15/2 of Dy3+ ions. Dy3+ doped phosphors (Ba1-xBi0.01) TiO3: xDy3+ (x= 0, 0.01, 0.03, 0.05 and 0.07) exhibit yellow emission and the highest intensity of emission demarcates the optimum concentration of Ba1-xBi0.01TiO3:0.05Dy3+. SEM studies to assess the surface morphologies alongside the elemental analyses from Energy dispersion spectroscopy (EDS) extensively for optimal concentration have been ventured. The Commission International De I-Eclairage (CIE) and Correlated Color Temperature (CCT) analyses authenticate the present phosphor genuine for fabricating light emitting diodes.

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Synthesis and photoluminescent characteristics of Dy³⁺doped Gd₂O₃phosphors

Cited by 22 publications

References 45 publications

Effect of synthesis method on the structural behavior of CaFeO2.5 compound

Effect of synthesis method on the structural behavior of CaFeO2.5 compound

Structural and optical properties of dysprosium‐doped hydroxyapatite nanoparticles and the use as a bioimaging probe in human cells

Effect of Bi2+ ions on the photoluminescence properties of BaTiO3:Dy3+ perovskite phosphors for LEDs application

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