Structural and optical properties of europium doped yttrium oxide nanoparticles for phosphor applications

Srinivasan, Ramasamy; Yogamalar, N. Rajeswari; Elanchezhiyan, J.; Joseyphus, R. Justin; Bose, A. Chandra

doi:10.1016/j.jallcom.2010.02.083

Cited by 106 publications

(53 citation statements)

References 38 publications

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“…The stretching frequency of the M-O band is found below 600 cm -1 for all synthesized samples. The peaks observed at 1376 and 1637 cm -1 in samples prepared through combustion correspond to the C-O band and O-H-O bending vibrations [26][27][28][29]. The C-O and O-H-O vibrations or more precisely OH -ions on the surface of particles act as a source of quencher to luminescence intensity and the luminescence intensity can be effectively increased after removing OHions via high-temperature heat treatment.…”

Section: Resultsmentioning

confidence: 99%

Structural and photoluminescence properties of red-light emitting YVO4:Eu3+ phosphor synthesized by combustion and solid-state reaction techniques: a comparative study

2015

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In this work, Eu 3? -doped YVO 4 phosphors were prepared via the solid-state reaction and the combustion method and the role of the synthesis process on the structural and emission properties of YVO 4 :Eu 3? was investigated. Combustion synthesis yielded tetragonal phase with the space group I4 1 /amd at a relatively low temperature and within short duration. The infrared spectra confirmed the characteristic bands of Y-O and V-O at around 450 and 830 cm -1 , while the samples prepared by combustion route exhibited C-O band and O-H-O bending vibrations at 1376 and 1637 cm -1 , respectively. The band gap energy of YVO 4 , prepared by different methods, was found in the range of 3.6-3.73 eV. Upon UV excitation, the Eu 3? -activated samples exhibited characteristic red-orange emission lines generated from 5 D 0 ? 7 F 1,2 transitions of Eu 3? ions, respectively. The red-to-orange emission intensity ratio was found to be around 4.6 for all samples and proved to be competitive with the commercially available red phosphors. However, Y 1-x Eu x VO 4 phosphors, synthesized by solid-state reaction technique, exhibited elevated Eu 3? solubility and higher emission intensity than the samples prepared by combustion route owing to the larger crystallite size and minor C-O and O-H bonds. The critical concentration of Eu 3? ions for the maximum emission was estimated to be 2.0 and 0.5 mol% for the samples obtained by solid-state reaction and combustion method, respectively. The present phosphors were observed to be effectively excitable via the broad range of UV lights and were proved to be compatible with the UV LEDs.

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Section: Resultsmentioning

confidence: 99%

Structural and photoluminescence properties of red-light emitting YVO4:Eu3+ phosphor synthesized by combustion and solid-state reaction techniques: a comparative study

2015

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“…• C confirms dehydration of structural water from YOOH phase [9,36]. Decomposition profile of yttrium hydroxide-nitrate compounds is fairly complex with overlapping steps.…”

Section: Thermal and Spectral Analysismentioning

confidence: 72%

Yttrium Oxide Nanoparticles Prepared by Heat Treatment of Cathodically Grown Yttrium Hydroxide

et al. 2011

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An easy two-step synthetic route is reported for the manufacture of yttrium oxide nanoparticles utilizing aqueous yttrium nitrate solution. In the first step, yttrium hydroxide precursor was grown on stainless steel electrode using a simple cathodic electrodeposition at room temperature. The subsequent second step includes the thermal decomposition of yttrium hydroxide powder at different temperatures for two hours. The synthesized products were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), differential scanning calorimetery (DSC), FT-IR and Raman spectroscopy. Results showed that the as-deposited Y(OH) 3 is composed of nanoparticles with grain size of approximately 40-50 nm. Cubic-structured Y 2 O 3 phase with a porous morphology was finally formed when temperature was raised to 600• C. Results suggested that the final oxide nanoparticles are crystalline and consist only of yttrium oxide phase forming agglomerates of many primary particles with average diameter around 30 nm.

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“…It was observed that the lattice parameter increases with the addition of dopant ions and was found to be up to 10.6051 Å, which is the proof of the incorporation of the Nd ions into Y 3+ sites due to the larger ionic radius of Nd 3+ (112.3 pm) than Y 3+ (104 pm) [9,10]. It was observed that the widths of the diffraction lines broadened with decreasing temperature because of the decreasing crystalline sizes.…”

Section: Structural Propertiesmentioning

confidence: 88%

Fabrication and spectral investigation of Y2O3:Nd3+ nanoparticles

et al. 2013

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In this study we have synthesized Y 2 O 3 (yttria) nanopowders with 1 % Nd 3+ concentration by using a thermal decomposition method and investigated the effect of annealing temperature on the particle sizes and the effect of particle sizes on the spectroscopic properties of these systems. The particle sizes were effectively controlled by synthesis and annealing temperatures; the sizes were found to vary in the 15-290 nm range. The particle sizes and cubic phase of the yttria were determined by using XRD patterns and confirmed by SEM and TEM measurements. We note that the particle sizes increase by increasing the synthesis and annealing temperatures. Temperature dependence of the width and position of a selected spectral line were successfully fitted with the theoretical expressions. We studied thoroughly the behavior of the samples under pulsed excitation and give plausible explanations of the measured effects.

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Structural and optical properties of europium doped yttrium oxide nanoparticles for phosphor applications

Cited by 106 publications

References 38 publications

Structural and photoluminescence properties of red-light emitting YVO4:Eu3+ phosphor synthesized by combustion and solid-state reaction techniques: a comparative study

Structural and photoluminescence properties of red-light emitting YVO4:Eu3+ phosphor synthesized by combustion and solid-state reaction techniques: a comparative study

Yttrium Oxide Nanoparticles Prepared by Heat Treatment of Cathodically Grown Yttrium Hydroxide

Fabrication and spectral investigation of Y2O3:Nd3+ nanoparticles

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