Photoluminescence characteristics of Ce and Eu activated MBPO5 (M = Sr, Ca) phosphors

Kharabe, V. R.; Oza, Abha H.; Dhoble, S.J.

doi:10.1016/j.ijleo.2015.08.090

Cited by 3 publications

(4 citation statements)

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“…It is evident that every discharge curve seems situated in the ultraviolet area, which is indicative of Ce 3+ ion emission. Following careful examination, the PL emission spectra of Ce 3+ ions in SrBPO5 and CaBPO5 phosphors may be helpful for scintillation operations by V. R. Kharabe et al [4]. Y, Gd and La doped BaBPO5 were prepared by conventional solid state method at 900°C.…”

Section: Materials and Synthesis Techniquesmentioning

confidence: 99%

A Brief Synthesis Methods and Luminescence Development of Rare Earth Activated Borophosphate Phosphor Materials

2024

IJFMR

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Rare-earth activated phosphors are capable of producing luminescent materials which are developed to overcoming the drawback of traditional based phosphors. Most changes happened in efficiencies of lighting for colors in the novel area research. This article focuses on brief discussions on synthesis methods, luminescence developments and also summarizing the current state of researches for the potential applications of rare-earth activated borophosphate phosphor materials in diverse technological fields. Its highlights of multifunctional phosphor materials converted into high intensity of white LEDs. Finally we address the chemical composition with rare-earths and synthesis techniques in the phosphor materials to production of high luminescence intensity.

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Section: Materials and Synthesis Techniquesmentioning

confidence: 99%

A Brief Synthesis Methods and Luminescence Development of Rare Earth Activated Borophosphate Phosphor Materials

2024

IJFMR

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“…[1][2][3] Ce 3+ with electronic configuration 4f 1 5d 0 6s 0 displays unique optical properties as an activator. [1][2][3] Ce 3+ with electronic configuration 4f 1 5d 0 6s 0 displays unique optical properties as an activator.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] Ce 3+ with electronic configuration 4f 1 5d 0 6s 0 displays unique optical properties as an activator. Phase and morphology of the samples were studied from powder X-ray diffraction (XRD) patterns and scanning electron microscope (SEM) micrographs, respectively.…”

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Probing the optical properties and luminescence mechanism of a UV‐emitting SrBPO₅:Ce³⁺ phosphor

et al. 2019

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Ce-doped (1 × 10 −5 to 3.0 mol%) SrBPO 5 phosphors were synthesized using a conventional solid-state reaction route at 1273 K in an air atmosphere. Phase and morphology of the samples were studied from powder X-ray diffraction (XRD) patterns and scanning electron microscope (SEM) micrographs, respectively. The band gap energies of the pure and Ce-doped SrBPO 5 phosphors were calculated from the recorded diffuse reflectance spectra. Photoluminescence (PL) and Ce 3+ lifetime were recorded at 300 and 77 K. Photoluminescence lifetime measurements revealed twolifetime values for Ce 3+ at both 300 K (17 and 36 nsec) and 77 K (12 and 30 nsec), suggesting the presence of two different environments around Ce 3+ . Time-resolved emission spectroscopy (TRES) studies confirmed the presence of Ce 3+ in two different environments. In addition, SrBPO 5 :Ce exhibited intense UV emission, signifying its possible use as an efficient sensitizer for solid-state lighting applications. The effect of γ-irradiation on PL was also determined. Thermally stimulated luminescence (TSL) glow curves of the γ-irradiated phosphor, along with trap parameters, doseresponse, and the possible TSL mechanism were also investigated. Positron annihilation lifetime spectroscopy was carried out to probe defects present in undoped and Ce-doped SrBPO 5 . KEYWORDSband gap, Ce-doped strontium borophosphate, photoluminescence, positron annihilation, thermally stimulated luminescence, trap parameters | INTRODUCTIONRare earth-doped solid-state phosphors have been given much attention due to their practical applications in various fields such as the lighting industry, biomedical fields for imaging, and the nuclear industry for scintillation and dosimetry, etc. [1][2][3] Ce 3+ with electronic configuration 4f 1 5d 0 6s 0 displays unique optical properties as an activator. [4,5] Ce 3+ emits in the UV-visible region, and the position of its lowest 5d band strongly depends on many factors such as host lattices, synthesis route, calcination temperature, and size of phosphors particles. [6][7][8][9][10] Unlike trivalent lanthanide ions, Ce 3+ 4f→5d transitions are parity allowed and show intense, broad luminescence that often sensitizes other Ln 3+ ions, enhancing their luminescence efficiency.Since the last decade, researchers have tried to synthesize an efficient green phosphor for multiple applications such as green lasers, siliconbased detectors, solar cells, fluorescence lamps, cathode ray tubes, and plasma display panels. [5,[11][12][13][14] In particular, the efficiency of green emitting Tb 3+ -doped phosphors can be remarkably enhanced by codoping with Ce 3+ in suitable hosts due to efficient energy transfer between Ce 3+ and Tb 3+ and leading to tricolour lamp

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Conventional synthesis and characterization of rare earth doped barium borophosphates, BaBPO5:RE (Y, Gd and La)

Gül

Kurtuluş

2016

Archives of Materials Science and Engineering

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Purpose: of this research, our target is synthesis and characterization of rare earth metalssuch as Y, Gd and La doped barium borophosphate compounds which are applicable innon-linear optics industry.Design/methodology/approach: The starting materials rare earth oxides, bariumcarbonate, boric acid and ammonium dihydrogen phosphate as analytically grade weighed0.01:1:1:1 molar ratio and homogenized in an agate mortar. The mixture placed into aporcelain crucible to heat in high temperature oven step by step. First, mixtures were waitedat 400°C for 2 hours for calcination process, subsequently heated 900°C with step rate10°C/m for 8 hours, and finally cooled down to room temperature with step rate 10°C/m.After many grindings final product get ready for characterization. X-ray powder diffraction(XRD) analysis was performed using PANanalytical X’Pert PRO Diffractometer (XRD) withCu Kα (1.5406 Å, 45 kV and 30 mA) radiation. Fourier transform infrared spectroscopy(FTIR) was taken on a Perkin Elmer Spectrum 100 FTIR Spectrometer from 4000 to 650cm-1. Scanning electron microscopy was achieved in SEM JEOL 6390-LV. Luminescenceproperties were performed by Andor Solis Sr 500i spectrophotometer. Conventional solidstate syntheses were done in Protherm furnace.Findings: The powder XRD patterns of the samples show that there is no impurity related todoping materials mean all diffractions corresponding to host material barium borophosphatecrystallized in hexagonal system with unit cell parameters a=7.1003 and c=6.9705 Å. Theunit cell parameters of rare earth doped barium borophosphates were calculated and displayboth increase and decrease depends on ionic Radius of rare earths. The other supportingmethods confirm the crystal structure and luminescence properties.Research limitations/implications: The synthesis method has some disadvantagessuch as low homogeneity, non-uniform product etc. We tried to minimize these negativeaspects in our research and succeeded.Practical implications: Phosphor materials Y:BaBPO5, Gd:BaBPO5 and La:BaBPO5(ICSD 51171) were synthesized by conventional solid state method and characterizationswas mainly based on powder X-ray diffraction pattern. Also, morphological and luminescenceproperties were completed to get the highest knowledge.Originality/value: Of the paper is first time conventional synthesis of Y, Gd and La dopedBaBPO5 compounds, calculation of unit cell parameters, and investigation of morphologicaland luminescent properties.

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Photoluminescence characteristics of Ce and Eu activated MBPO5 (M = Sr, Ca) phosphors

Cited by 3 publications

References 17 publications

A Brief Synthesis Methods and Luminescence Development of Rare Earth Activated Borophosphate Phosphor Materials

A Brief Synthesis Methods and Luminescence Development of Rare Earth Activated Borophosphate Phosphor Materials

Probing the optical properties and luminescence mechanism of a UV‐emitting SrBPO₅:Ce³⁺ phosphor

Conventional synthesis and characterization of rare earth doped barium borophosphates, BaBPO5:RE (Y, Gd and La)

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Photoluminescence characteristics of Ce and Eu activated MBPO5 (M = Sr, Ca) phosphors

Cited by 3 publications

References 17 publications

A Brief Synthesis Methods and Luminescence Development of Rare Earth Activated Borophosphate Phosphor Materials

A Brief Synthesis Methods and Luminescence Development of Rare Earth Activated Borophosphate Phosphor Materials

Probing the optical properties and luminescence mechanism of a UV‐emitting SrBPO5:Ce3+ phosphor

Conventional synthesis and characterization of rare earth doped barium borophosphates, BaBPO5:RE (Y, Gd and La)

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Probing the optical properties and luminescence mechanism of a UV‐emitting SrBPO₅:Ce³⁺ phosphor