Eu3+/Tb3+-codoped Y2O3 nanophosphors: Rietveld refinement, bandgap and photoluminescence optimization

Som, Sudipta; Sharma, S.K.

doi:10.1088/0022-3727/45/41/415102

Cited by 236 publications

(114 citation statements)

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“…concentration of the samples, synthesized by solid-state reaction technique, is observed to be 2 %, while that for the samples, synthesized via combustion method, is found to be 0.5 %. Such low optimum concentration for maximum emission in the Y 1-x Eu x VO 4 phosphors, synthesized by combustion route, may be due to less crystallinity or crystallite size and the presence of O-H and C-O bands [37]. Moreover, the surface morphology of samples prepared by combustion route is not regular as like the solid-state reaction method and this could also be a possible reason of low quenching point.…”

Section: Resultsmentioning

confidence: 99%

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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%

“…8(a) and 8(b) along with insets, reveal the characteristic Eu 3? emission lines [36][37][38]. It could mean that crystal field symmetry around Eu 3?…”

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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“…1b. These two cation sites are distributed over two Wyckoff positions of 8b (S 6 symmetry) and 24d (C 2 symmetry) [4,5]. The occupancies of the C 2 and S 6 sites are 75 and 25%, respectively (the ratio between them is 3:1) [7,14].…”

Section: Structural and Morphology Analysesmentioning

confidence: 99%

“…Oxygen ions are located in the general 48e positions [4,5]. Cation site occupancy is a very important structural parameter that determines optical and other physical properties [5].…”

Section: Introductionmentioning

confidence: 99%

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X-ray photoelectron spectroscopy and luminescent properties of Y2O3:Bi3+ phosphor

Jafer

Coetsee

Yousif

et al. 2015

Applied Surface Science

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Designing Multicolor Dual‐Mode Lanthanide‐Doped NaLuF₄/Y₂O₃ Composites for Advanced Anticounterfeiting

Xiao

Yao

Wang

et al. 2019

Advanced Optical Materials

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of consumers, because the counterfeit products are usually use inferior and can contain harmful raw materials. [5] Thus, it is critical to develop more safe anticounterfeiting techniques that are easy to identify and difficult to imitate. [6] In recent years, owing to the vigorous development of science and technology, various kinds of anticounterfeiting techniques have emerged, [7][8][9] such as barcodes, [10] radio frequency identification technology, [11] laser holograms, [12] and watermarks, [13] which can effectively combat counterfeiting and safeguard brand holders. Unfortunately, the easy duplication features and high manufacturing costs of these anticounterfeiting technologies limit their applications. Owing to tunable and customizable optical properties, low-cost and reliable luminescent materials have attracted considerable attention in anticounterfeiting fields. [14] A group of fluorescent materials have been developed and applied in the information security and anticounterfeiting fields that can emit visible light under the excitation of an ultraviolet (UV) lamp or a near-infrared (NIR) laser. [15][16][17] High-performance fluorescent materials mainly include Ln 3+ -doped materials, [14,18] carbon dots, [19,20] quantum dots, [21][22][23] plasmonic materials, [24] metal-organic frameworks, [25,26] etc. Compared to other fluorescent materials, Ln 3+ -doped fluorescent materials have emerged as a promising candidate because of their intrinsic multicolor luminescent properties, long fluorescence lifetime, excellent photochemical stability, and good biocompatibility. [18,27,28] There are two main fluorescent conversion modes in Ln 3+ -doped luminescent materials: upconversion (UC) and downconversion (DC). [1,29] Ln 3+ -doped UC materials can convert multiple low-energy photons (in the NIR region) into a high-energy photon, achieving visible light output. [30,31] The color of the UC emission light can be conveniently modulated by doping different kinds of Ln 3+ or changing the doping concentration of the activator. Recently, UC fluorescent composites emitting red-green-blue (RGB) light have been successfully prepared, and panchromatic displays have been implemented by mixing them in a certain proportion. [29,31,32] Even with great advantages, single-mode anticounterfeiting technology based on UC materials is still unsafe because it is easy to imitate by using other chemicals. Therefore, there is an urgent requirement for exploiting dual-mode or multimode anticounterfeiting Owing to the large coding capacity and high confidentiality, dual-mode or multimode anticounterfeiting fluorescent materials are gradually substituting traditional single-mode fluorescent materials. Herein, a facile hydrothermal method is designed and used to integrate lanthanide ion (Ln 3+ )-doped NaLuF 4 nanoparticles with Y 2 O 3 -based downconversion nanorods, achieving the construction of dual-mode luminescent composite materials. The excellent optical properties of NaLuF 4 /Y 2 O 3 composites are confirmed by photoluminescence spect...

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Eu³⁺/Tb³⁺-codoped Y₂O₃ nanophosphors: Rietveld refinement, bandgap and photoluminescence optimization

Cited by 236 publications

References 24 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

X-ray photoelectron spectroscopy and luminescent properties of Y2O3:Bi3+ phosphor

Designing Multicolor Dual‐Mode Lanthanide‐Doped NaLuF₄/Y₂O₃ Composites for Advanced Anticounterfeiting

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Eu3+/Tb3+-codoped Y2O3 nanophosphors: Rietveld refinement, bandgap and photoluminescence optimization

Cited by 236 publications

References 24 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

X-ray photoelectron spectroscopy and luminescent properties of Y2O3:Bi3+ phosphor

Designing Multicolor Dual‐Mode Lanthanide‐Doped NaLuF4/Y2O3 Composites for Advanced Anticounterfeiting

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Product

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Eu³⁺/Tb³⁺-codoped Y₂O₃ nanophosphors: Rietveld refinement, bandgap and photoluminescence optimization

Designing Multicolor Dual‐Mode Lanthanide‐Doped NaLuF₄/Y₂O₃ Composites for Advanced Anticounterfeiting