Novel blue-emitting phosphor NaMg4(PO4)3:Eu2+, Ce3+ with energy transfer

Lijun, Lan; Feng, Hao; Tang, Yan; Tang, Wanjun

doi:10.1016/j.optmat.2011.08.008

Cited by 23 publications

(4 citation statements)

References 15 publications

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“…SCS of phosphate-based phosphors include preparation of water-based reactive slurries of metal nitrates, ammonium dihydrogen phosphate, and urea followed by ignition in preheated furnaces at temperatures between 500– 600 °C. − For incorporation of fluorine into the crystal structure of phosphors, ammonium fluoride was also added into reactive solutions and slurries. , In most cases, postsynthesis annealing in air at temperatures between 800–1200 °C was applied. It is reported that for the preparation of Eu 2+ activated phosphors, the annealing stage should be performed in reductive atmosphere. − For example, Tang and Xue reported SCS of a series of orthophosphate solid solutions with a general formula of Sr 8 Mg 1– m Zn m Y(PO 4 ) 7 :Eu 2+ by immersion of reactive solutions in preheated furnace for 5 min to initiate the combustion reaction . The products obtained were annealed at 1300 °C for 3 h under a 5%H 2 /95%N 2 gas mixture.…”

Section: Solution Combustion-derived Materialsmentioning

confidence: 99%

Solution Combustion Synthesis of Nanoscale Materials

Mukasyan²,

et al. 2016

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Solution combustion is an exciting phenomenon, which involves propagation of self-sustained exothermic reactions along an aqueous or sol-gel media. This process allows for the synthesis of a variety of nanoscale materials, including oxides, metals, alloys, and sulfides. This Review focuses on the analysis of new approaches and results in the field of solution combustion synthesis (SCS) obtained during recent years. Thermodynamics and kinetics of reactive solutions used in different chemical routes are considered, and the role of process parameters is discussed, emphasizing the chemical mechanisms that are responsible for rapid self-sustained combustion reactions. The basic principles for controlling the composition, structure, and nanostructure of SCS products, and routes to regulate the size and morphology of the nanoscale materials are also reviewed. Recently developed systems that lead to the formation of novel materials and unique structures (e.g., thin films and two-dimensional crystals) with unusual properties are outlined. To demonstrate the versatility of the approach, several application categories of SCS produced materials, such as for energy conversion and storage, optical devices, catalysts, and various important nanoceramics (e.g., bio-, electro-, magnetic), are discussed.

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Section: Solution Combustion-derived Materialsmentioning

confidence: 99%

Solution Combustion Synthesis of Nanoscale Materials

Mukasyan²,

et al. 2016

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“…The dopant Ce 3+ ions are expected to replace the Na + ions in the host matrix. Although there is a large mismatch between the ionic radii and the charge of Na + and Ce 3+ ions, the occupation of Ce 3+ ions in the cluster of Na + ions is sure to occur . Instead of substituting a single Na + ionic site, there is a preference for Ce 3+ ions to replace a cluster of three Na + ions.…”

Section: Resultsmentioning

confidence: 99%

“…Their chemical composition, degree of structural disorder, defects and the presence of dopants/impurities have notable influence on the electronic and optical properties of luminescent materials. The luminescent properties of Ce 3+ ‐doped compounds have been of considerable interest in recent years . Ce 3+ has a very simple electron configuration, there is only one electron in the 4f shell and it is an excellent system for studying the behavior of one‐electron 4f and 5d states in different environments .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of novel Na₁₅(SO₄)₅F₄Cl:Ce³⁺halosulfate phosphors

Bhake

Nair

Zade³

2016

Luminescence

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A series of Na (SO ) F Cl phosphors doped with Ce ions was prepared using the wet chemical method. X-Ray diffraction studies were used to determine their phase formation and purity. Fourier transform infrared spectroscopy effectively identified the chemical bonds present in the molecule. The photoluminescence properties of the as-prepared phosphors were investigated and the Ce ions in these hosts were found to give broadband emission in the UV range. For the thermoluminescence study, phosphors were irradiated with a 5 Gy dose of γ-rays from a Co source. Chen's half-width method was employed to calculate the trapping parameters from the thermoluminescence glow curve. Copyright © 2016 John Wiley& Sons, Ltd.

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“…The impedance spectra as a function of temperature were employed, in order to analyze the identification of charge transport processes in the grain and grain boundary effects in NaMg 4 (PO 4 ) 3 [14]. The purpose of this study is to analyze the electrical response of the grain and grain boundary effects, by making an interpretation of the microscopic process that allows discerning the role of grain and grain boundary.…”

Section: Electrical Propertiesmentioning

confidence: 99%

Electrical properties and conduction mechanism of the NaMg4(PO4)3 compound

et al. 2016

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The NaMg 4 (PO 4 ) 3 phosphor was prepared by the conventional high-temperature solid-state reaction. The phase formation of the compound was confirmed by the powder X-ray diffraction. Electrical properties of the compound have been studied using complex impedance spectroscopy in the frequency range 209 Hz-1 MHz and temperature range 648-712 K. The AC conductivity for grain contribution was interpreted using the universal Jonscher's power law. The temperature dependence of frequency exponent s was investigated to understand the conduction mechanism in NaMg 4 (PO 4 ) 3 compound. The non-overlapping small polaron tunneling model can explain the temperature dependence of the frequency exponent, and it was a closely good model to describe the dominant conduction mechanism.

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Novel blue-emitting phosphor NaMg4(PO4)3:Eu2+, Ce3+ with energy transfer

Cited by 23 publications

References 15 publications

Solution Combustion Synthesis of Nanoscale Materials

Solution Combustion Synthesis of Nanoscale Materials

Synthesis and characterization of novel Na₁₅(SO₄)₅F₄Cl:Ce³⁺halosulfate phosphors

Electrical properties and conduction mechanism of the NaMg4(PO4)3 compound

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Novel blue-emitting phosphor NaMg4(PO4)3:Eu2+, Ce3+ with energy transfer

Cited by 23 publications

References 15 publications

Solution Combustion Synthesis of Nanoscale Materials

Solution Combustion Synthesis of Nanoscale Materials

Synthesis and characterization of novel Na15(SO4)5F4Cl:Ce3+halosulfate phosphors

Electrical properties and conduction mechanism of the NaMg4(PO4)3 compound

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Synthesis and characterization of novel Na₁₅(SO₄)₅F₄Cl:Ce³⁺halosulfate phosphors