Europium doped silicate phosphors: Synthetic and characterization techniques

Singh, Devender; Sheoran, Suman; Tanwar, Vijeta

doi:10.5185/amlett.2017.7011

Cited by 40 publications

(11 citation statements)

References 4 publications

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“…RE 3+ ions are the preferred dopants as their ionic radii show a close match with those of the host matrix; these ions account for a relevant colour perception [27, 28]. Characteristically, the synthetic method plays a crucial role in the determination of morphology in synthesized powdered samples [29]. Literature studies revealed that different synthetic methods were used to synthesize Tb(III)‐doped nanophosphors.…”

Section: Introductionmentioning

confidence: 99%

Crystallographic, morphological and photoluminescent investigations of Tb³⁺‐doped YAlO₃ perovskites for lighting applications

et al. 2023

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Terbium(III)‐doped yttrium aluminate perovskite (YAP:xTb3+) (x = 0.01–0.08 mol) was synthesized using a simple gel‐combustion method. Structural elucidations were performed using X‐ray diffraction (XRD) and Rietveld analysis. Fourier‐transform infrared spectral studies validated the efficient synthesis of designed doped samples. Transmission electron microscopic images showed the agglomerated irregular dimensions of the synthesized nanocrystalline materials. When excited at 251 nm, a strong emissive line attributed to 5D4 → 7F5 electronic transition was observed at 545 nm (green emission). The maximum luminescence was found at the optimized concentration (0.05 mol) of Tb3+ ions; this emission was quenched by dipolar–dipolar (d–d) interactions. Chromaticity (x and y) and correlated colour temperature parameters were obtained by analysing the emission profiles. Finally, the colour coordinates of nanophosphors were closer to the National Television Standards Committee green coordinates, which replicates their potency in the design and architecture of R‐G‐B‐based white LEDs.

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Section: Introductionmentioning

confidence: 99%

Crystallographic, morphological and photoluminescent investigations of Tb³⁺‐doped YAlO₃ perovskites for lighting applications

et al. 2023

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“…Among the silicate compounds, the different compositions of yttrium silicates have been highlighted due to their excellent properties as host lattice for rare earth elements [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Reduction of Eu3+ to Eu2+ in α-Y2Si2O7 and X1-Y2SiO5 and their luminescent properties

Martı́nez

Arroyo

Korthout

et al. 2018

Journal of Alloys and Compounds

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Due to its bright tunable emission, Eu-doped yttrium silicates are very interesting materials for LED applications. The microparticles of α-Y 1.98 Eu 0.02 Si 2 O 7 and the low-temperature phase of Y 1.98 Eu 0.02 SiO 5 (X1) were prepared by sol gel technique. Then, the samples were reduced at high temperatures using pure hydrogen as reduction agent. The materials obtained were characterized by X-Ray diffraction, Scanning Electron Microscopy, Energy Dispersive X-Ray and Photoluminescence spectroscopy. The presence of Eu 2+ in the materials after the reduction was confirmed by the blue-green band emission and the wide absorption band, observed only in the excitation spectra of the reduced samples. These

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“…The peak positions and intensities of these bands bear a strong relationship with the size distribution of the crystal grain, their chemical composition, and morphology. Earlier reports have shown that crystal grain size, their distribution, resistance to particle agglomeration, and spherical morphology are the most critical factors for a phosphor to have good luminescent characteristics [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence Property of Eu3+ doped CaSiO3 Nano-phosphor with Controlled Grain Size

Niraula¹,

Rizal²

2018

Colloids and Interfaces

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A series of Eu3+ doped CaSiO3/SiO2 nano-phosphor powder of controlled grain size, crystalline structure, and chemical composition were synthesized using the microemulsion technique. The morphology, size, and shape of the synthesized nanophosphorous powder were investigated using transmission electron microscopy and X-ray diffraction (XRD) analysis. XRD profiles of samples sintered over 600 °C, suggested phase shift from amorphous powder grain to more ordered polycrystalline powder of triclinic type wollastonite, CaSiO3, with preferred crystal phase orientation of (112) and tetragonal type cristobalites of SiO2. The grain size, crystallinity, and chemical composition of the host matrix, activator and sensitizer strongly affected both the absorption and emission bands of these samples. The amplitude of both the orange and red emission bands significantly increased with sintering temperature. The emission band is red-shifted with decreasing grain sizes. These bands displayed good sensitivity to ionic concentration of the Si4+, Ca2+, and Eu3+. With increasing Ca2+ ion concentration both the intensity of the red photoluminescence (PL) band increased and a concentration quenching observed. Increase in Si4+ ion concentration led to quenching in PL intensity of both the orange and red bands, whereas the amplitude of the blue-band slightly increased. With increasing Eu3+ ion concentration the red-band initially increased whereas it started decreasing at higher sample concentration. In the presence of Ca2+ ion as a sensitizer, the sample showed a remarkable PL property-including–about 100% photon conversion efficiency and a two-fold increase in excitation and emission photons.

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Europium doped silicate phosphors: Synthetic and characterization techniques

Cited by 40 publications

References 4 publications

Crystallographic, morphological and photoluminescent investigations of Tb³⁺‐doped YAlO₃ perovskites for lighting applications

Crystallographic, morphological and photoluminescent investigations of Tb³⁺‐doped YAlO₃ perovskites for lighting applications

Reduction of Eu3+ to Eu2+ in α-Y2Si2O7 and X1-Y2SiO5 and their luminescent properties

Photoluminescence Property of Eu3+ doped CaSiO3 Nano-phosphor with Controlled Grain Size

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Europium doped silicate phosphors: Synthetic and characterization techniques

Cited by 40 publications

References 4 publications

Crystallographic, morphological and photoluminescent investigations of Tb3+‐doped YAlO3 perovskites for lighting applications

Crystallographic, morphological and photoluminescent investigations of Tb3+‐doped YAlO3 perovskites for lighting applications

Reduction of Eu3+ to Eu2+ in α-Y2Si2O7 and X1-Y2SiO5 and their luminescent properties

Photoluminescence Property of Eu3+ doped CaSiO3 Nano-phosphor with Controlled Grain Size

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Crystallographic, morphological and photoluminescent investigations of Tb³⁺‐doped YAlO₃ perovskites for lighting applications

Crystallographic, morphological and photoluminescent investigations of Tb³⁺‐doped YAlO₃ perovskites for lighting applications