Spectroscopic analysis of Eu<sup>3+</sup> doped silica–titania–polydimethylsiloxane hybrid ORMOSILs

Gopinath, R.; Gopi, Subash; Simon, Sanu Mathew; Saritha, A; Biju, P.R.; Joseph, Cyriac; Unnikrishnan, N. V.

doi:10.1039/d0ra03073b

Cited by 17 publications

(2 citation statements)

References 49 publications

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“…By comparing the luminescence for the 5 D 0 → 7 F 1 and 5 D 0 → 7 F 2 transitions, the asymmetry factor can be determined, which allows us to assume the presence of lanthanide ions in the crystal lattice. For this purpose, the incident results were processed using the formula [ 12 , 16 , 42 ]:

…”

Section: Resultsmentioning

confidence: 99%

Crystallization Mechanism and Optical Properties of Antimony-Germanate-Silicate Glass-Ceramic Doped with Europium Ions

et al. 2022

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Glass-ceramic is semi-novel material with many applications, but it is still problematic in obtaining fibers. This paper aims to develop a new glass-ceramic material that is a compromise between crystallization, thermal stability, and optical properties required for optical fiber technology. This compromise is made possible by an alternative method with a controlled crystallization process and a suitable choice of the chemical composition of the core material. In this way, the annealing process is eliminated, and the core material adopts a glass-ceramic character with high transparency directly in the drawing process. In the experiment, low phonon antimony-germanate-silicate glass (SGS) doped with Eu3+ ions and different concentrations of P2O5 were fabricated. The glass material crystallized during the cooling process under conditions similar to the drawing processes’. Thermal stability (DSC), X-ray photo analysis (XRD), and spectroscopic were measured. Eu3+ ions were used as spectral probes to determine the effect of P2O5 on the asymmetry ratio for the selected transitions (5D0 → 7F1 and 5D0 → 7F2). From the measurements, it was observed that the material produced exhibited amorphous or glass-ceramic properties, strongly dependent on the nucleator concentration. In addition, the conducted study confirmed that europium ions co-form the EuPO4 structure during the cooling process from 730 °C to room temperature. Moreover, the asymmetry ratio was changed from over 4 to under 1. The result obtained confirms that the developed material has properties typical of transparent glass-ceramic while maintaining high thermal stability, which will enable the fabrication of fibers with the glass-ceramic core.

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…”

Section: Resultsmentioning

confidence: 99%

Crystallization Mechanism and Optical Properties of Antimony-Germanate-Silicate Glass-Ceramic Doped with Europium Ions

et al. 2022

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“…The product of the s e and observed lifetime (s) is an important consideration for high optical amplier gain. 7,33 , and 3.518-3.987 Â 10 À25 cm 2 s, respectively. The large values of the stimulated emission cross-section, gain bandwidth, optical gain, and lifetime support that MNb 2 O 6 :Eu 3+ (M ¼ Sr, Cd, Ni) phosphors can be helpful for the improvement of the red lasing and red color applications for display devices.…”

Section: Phosphormentioning

confidence: 95%

Judd–Ofelt parameters and X-ray irradiation results of MNb₂O₆:Eu³⁺ (M = Sr, Cd, Ni) phosphors synthesized via a molten salt method

2021

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Spectral Investigation of Enhanced Orange Emission in Eu³⁺ Activated LaPO₄ Nanophosphors Through Codoping With Na⁺ and Bi³⁺ Ions

Aswathy R,

Linju Ann,

Issac

et al. 2024

Luminescence

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Lanthanum phosphate is a well‐known potential host for rare earth activators for phosphor‐converted white LED application. Na+ and Bi3+ codoped Eu3+ activated LaPO4 nanophosphor is successfully synthesized using citrate‐based hydrothermal method at ambient condition and confirmed by XRD, EDS and XPS analysis. The excitation spectra of the sample exhibit sharp f‐f characteristics peak of Eu3+ at 393 nm that is found to be the most dominant. The comparative photoluminescence studies of La1‐xPO4:xEu3+(x = 0.10), La1‐x‐y PO4:xEu3+, yNa+(x = 0.10, y = 0.05), and La1‐x‐y‐zPO4:xEu3+, yNa+, zBi3+ (x = 0.10, y = z = 0.05) reveal a progressive enhancement of the orange emission from Eu3+ as Na+ and (Na+, Bi3+) ions are incorporated into the LaPO4 matrix. The dominance of 5D0‐7F1 magnetic dipole transition contributing a major part of orange luminescence of the nanophosphors and the symmetric site occupancy of Eu3+ was justified from the observed trend of in the Judd–Ofelt intensity parameters. The CIE studies confirm the improvement in color purity of emission from 32.5% to 90.6% due to the presence of Na+ and Bi3+ions.

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Spectroscopic analysis of Eu³⁺ doped silica–titania–polydimethylsiloxane hybrid ORMOSILs

Abstract: Eu3+ doped silica–titania–polydimethylsiloxane ORMOSIL emits broad blue host band and characteristic Eu3+ emission peaks simultaneously when excited at 394 nm.

Cited by 17 publications

References 49 publications

Crystallization Mechanism and Optical Properties of Antimony-Germanate-Silicate Glass-Ceramic Doped with Europium Ions

Crystallization Mechanism and Optical Properties of Antimony-Germanate-Silicate Glass-Ceramic Doped with Europium Ions

Judd–Ofelt parameters and X-ray irradiation results of MNb₂O₆:Eu³⁺ (M = Sr, Cd, Ni) phosphors synthesized via a molten salt method

Spectral Investigation of Enhanced Orange Emission in Eu³⁺ Activated LaPO₄ Nanophosphors Through Codoping With Na⁺ and Bi³⁺ Ions

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Spectroscopic analysis of Eu3+ doped silica–titania–polydimethylsiloxane hybrid ORMOSILs

Abstract: Eu3+ doped silica–titania–polydimethylsiloxane ORMOSIL emits broad blue host band and characteristic Eu3+ emission peaks simultaneously when excited at 394 nm.

Cited by 17 publications

References 49 publications

Crystallization Mechanism and Optical Properties of Antimony-Germanate-Silicate Glass-Ceramic Doped with Europium Ions

Crystallization Mechanism and Optical Properties of Antimony-Germanate-Silicate Glass-Ceramic Doped with Europium Ions

Judd–Ofelt parameters and X-ray irradiation results of MNb2O6:Eu3+ (M = Sr, Cd, Ni) phosphors synthesized via a molten salt method

Spectral Investigation of Enhanced Orange Emission in Eu3+ Activated LaPO4 Nanophosphors Through Codoping With Na+ and Bi3+ Ions

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Product

Resources

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Spectroscopic analysis of Eu³⁺ doped silica–titania–polydimethylsiloxane hybrid ORMOSILs

Judd–Ofelt parameters and X-ray irradiation results of MNb₂O₆:Eu³⁺ (M = Sr, Cd, Ni) phosphors synthesized via a molten salt method

Spectral Investigation of Enhanced Orange Emission in Eu³⁺ Activated LaPO₄ Nanophosphors Through Codoping With Na⁺ and Bi³⁺ Ions