Optical and morphologic properties of YVO 4 :Eu phosphor

Georgescu, S.; Voiculescu, Ana-Maria; Cotoi, E.; Toma, O.; Gheorghe, L.; Achim, Alexandru; Matei, C.; Enculescu, Ionuţ; Matei, Elena; Osiac, M.

doi:10.1117/12.866769

Cited by 9 publications

(18 citation statements)

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“…The non-exponential character of the 5 D 0 decay could be due to the nonuniformity of the sites occupied by Eu 3+ ions in nanocrystallites and to the influence of the impurities still present on the grain surfaces. For the bulk Eu:LGN [7], the decay of 5 D 0 is exponential with = 1050 s; the efficiency lifetime for 5 D 1 is 63 s, not far from the values obtained for sol-gel samples.…”

Section: Resultsmentioning

confidence: 68%

“…Since the areas of the 5 D 0 → 7 F 5,6 transitions are very small [7], only 5 D 0 → 7 F J (J = 0, 1, 2, 3, and 4) lines are shown. We obtained R 2 = 5.13 ± 0.02 for the sample annealed at 700 • C and 5.06 ± 0.02 for the sample annealed at 800 • C. For the Eu-LGN powder obtained by milling the single crystal, R 2 = 4.68 ± 0.02 [7]. The reduction of the asymmetry ratio with the annealing temperature is related to the improving of the local symmetry produced by the increase of the particle size.…”

Section: Resultsmentioning

confidence: 99%

“…For decay measurements, the luminescence was excited with the second harmonics of a Nd-YAG laser and analyzed with an Ortec MCS-PCI multichannel scaler card. The experimental setup for diffuse reflectance measurements was described elsewhere [5]. All measurements were performed at room temperature.…”

Section: Methodsmentioning

confidence: 99%

“…The effect of thermal treatments is examined using XRD and optical spectroscopy (diffuse reflectance and luminescence spectra, kinetics of the luminescent levels 5 D 0 and 5 D 1 ). A comparison is made with the results obtained on crystalline Eu:LGN [7].…”

Section: Introductionmentioning

confidence: 95%

“…The luminescence properties of LGS, LGT, and LGN Eu-doped crystals were discussed in Refs. [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Luminescence of Eu-doped langanite nanopowders synthesized by a citrate sol–gel method

Georgescu

Voiculescu

Toma

et al. 2010

Journal of Alloys and Compounds

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Section: Resultsmentioning

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

“…The luminescence properties of LGS, LGT, and LGN Eu-doped crystals were discussed in Refs. [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Luminescence of Eu-doped langanite nanopowders synthesized by a citrate sol–gel method

Georgescu

Voiculescu

Toma

et al. 2010

Journal of Alloys and Compounds

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Isotope‐like effect in YVO₄:Eu³⁺ nanopowders: Raman spectroscopy

Mitrić

Ralević

Mitrić

et al. 2019

J Raman Spectroscopy

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In this paper, we describe synthesis and characterization of YVO 4 and Eu 3+doped YVO 4 nanopowders. Two methods of preparation were used-solution combustion synthesis (SCS) and classical ceramic method (CCM)-and compared. Morphology and structure of all samples were characterized with atomic-force microscopy (AFM), X-ray diffraction (XRD), and field-emission scanning electron microscopy (SEM). Raman spectroscopy was used to discuss the isotope-like effect. It is confirmed that doping with Eu ions results in a change of Raman spectra of doped samples-new modes arise, and intensity of existing ones change. Influence of different preparation methods on isotope-like effect is presented with detailed calculations of shifted modes.

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Role of the Sintering Temperature and Doping Level in the Structural and Spectral Properties of Eu-Doped Nanocrystalline YVO₄

2011

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A sol-gel approach was employed to prepare nanosized YVO(4) nanopowders doped with Eu(3+) ions. Raw nanomaterials were thermally treated at 700-1000 °C for 3 h. X-ray diffraction (XRD) analysis demonstrated that single-phase nanopowders with high crystallite dispersion were obtained. Our studies were focused on relating the luminescence properties of the Eu(3+) dopant to the nanocrystallite (NC) size. Depending on the thermal treatment, the average NC size was calculated to range from 20 nm to 1.1 μm. We have found that the size effect manifests mainly in the expansion of the cell volume and broadening of XRD peaks, as indicated by Rietveld analysis. Moreover, emission and excitation spectra, although typical for the Eu(3+) ions, demonstrated some degree of correlation with the calcination temperature and doping concentration. To explain these differences a detailed analysis of the luminescence spectra by the Judd-Ofelt theory has been performed.

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Optical and morphologic properties of YVO 4 :Eu phosphor

Cited by 9 publications

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Luminescence of Eu-doped langanite nanopowders synthesized by a citrate sol–gel method

Luminescence of Eu-doped langanite nanopowders synthesized by a citrate sol–gel method

Isotope‐like effect in YVO₄:Eu³⁺ nanopowders: Raman spectroscopy

Role of the Sintering Temperature and Doping Level in the Structural and Spectral Properties of Eu-Doped Nanocrystalline YVO₄

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Optical and morphologic properties of YVO 4 :Eu phosphor

Cited by 9 publications

References 0 publications

Luminescence of Eu-doped langanite nanopowders synthesized by a citrate sol–gel method

Luminescence of Eu-doped langanite nanopowders synthesized by a citrate sol–gel method

Isotope‐like effect in YVO4:Eu3+ nanopowders: Raman spectroscopy

Role of the Sintering Temperature and Doping Level in the Structural and Spectral Properties of Eu-Doped Nanocrystalline YVO4

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Isotope‐like effect in YVO₄:Eu³⁺ nanopowders: Raman spectroscopy

Role of the Sintering Temperature and Doping Level in the Structural and Spectral Properties of Eu-Doped Nanocrystalline YVO₄