Spectroscopic characteristics of Dy3+ impurities–doped borate-based glasses: Judd–Ofelt calculation

Ahmad, Akil; Hashim, Suhairul; Ghoshal, Sib Krishna

doi:10.1016/j.matchemphys.2020.123386

Cited by 29 publications

(6 citation statements)

References 57 publications

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“…Glass with a lower bandgap typically has greater structural strength. Based on this study, borate glass should yield values of the same order [7, 16–18].…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, using lithium as a modifier in the borate glass can strengthen chemical stability, modify its chemical as well as physical properties, such as suppressing the high phonon energies, and transform sp 2 BO 3 units into stable sp 3 BO 4 units. Moreover, by generating nonbridging oxygen (NBO) in the structure of borate glass networks, lithium lowers the hygroscopicity of the system and stabilizes it [6,7]. Furthermore, borate glass containing zinc oxide has exhibited enhanced antibacterial properties.…”

Section: Introductionmentioning

confidence: 99%

“…Glass with a lower bandgap typically has greater structural strength. Based on this study, borate glass should yield values of the same order[7,[16][17][18].To examine the luminescence dynamics and energy levels caused by the luminescence mechanism from the trivalent dysprosium ions, photoluminescence (PL) spectra were recorded for all prepared glass that contained Dy 3+ , as depicted in Figures3 and 4a. LZB glass activated by 0.5 Dy 3+ has a PL excitation spectrum that can be monitored emission at 573 nm as demonstrated in Figure3.…”

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confidence: 99%

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Noncytotoxic Dy³⁺‐activated glass emits cool white light for near ultraviolet‐based white light‐emitting diodes, visible lasers, and biomedical applications

et al. 2023

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Using the melt quenching technique, a lithium zinc borate glass (LZB) system with trivalent dysprosium ions (Dy3+) was synthesized, and the luminescence and lasing properties of these materials were examined for the generation of white light. Structural investigation through X‐ray diffraction revealed that the prepared glass had an amorphous nature. The optimized glass containing 0.5 Dy3+ had a direct optical band gap of 2.782 eV and an indirect optical band gap of 3.110 eV. A strong excitation band at 386 nm (6H15/2→4I13/2) was recognized in the ultraviolet (UV) light region of its excitation spectrum. Emission bands could be seen in the photoluminescence spectrum at 659, 573, and 480 nm under the 386 nm excitation. These transitions of emission resembled electronic transitions such as (4F9/2→6H11/2), (4F9/2→6H13/2), and (4F9/2→6H15/2). In a pristine glass matrix, the higher intensity ratio of yellow to blue can result in the production of white light. The optimized Dy3+ ion concentration was observed to be 0.5 mol%. In addition, an analysis of lifetime decay was conducted for all synthesized glasses, and their decay trends were systematically investigated. Noticeably, we assessed the photometric parameters and found that they were close to the white light standard. Furthermore, a cytotoxicity study was carried out using lung fibroblast (WI‐38) cell lines for the optimized 0.5Dy3+‐doped LZB glass and it appeared to be noncytotoxic. It is clear from the results that the noncytotoxic LZB glass doped with 0.5 Dy3+ ions could be a suggestive choice for the manufacture of white light‐emitting diodes and lasers using near‐UVs.

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“…Glass with a lower bandgap typically has greater structural strength. Based on this study, borate glass should yield values of the same order [7, 16–18].…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Noncytotoxic Dy³⁺‐activated glass emits cool white light for near ultraviolet‐based white light‐emitting diodes, visible lasers, and biomedical applications

et al. 2023

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“…The characteristic excitation band of Ag + ion at about 260 nm ( 1 S 0 → 3 D 1 ) is red shifted as the Ag content increases [40]. The prominent peaks have been located at 325 ( [50]. These eight peaks in the excitation spectra correspond to blue, near-UV and UV lights, indicating that H-Dy-yAg glasses can be efficiently excited by UV LED chips for producing white light.…”

Section: Pl Characteristics Of Agmentioning

confidence: 96%

“…Table 6 displays the calculated J-O intensity parameters for H-0.5Dy-yAg glasses along with the other Dy 3+ and Ag doped glass systems [8,19,20,23,26]. Among the J-O parameters Ω 2 characterizes the covalency and asymmetry of the bond between RE ions and oxygen ligands, while Ω 4 and Ω 6 provide information about bulk properties such as rigidity, basicity, and viscosity of glass host [50]. The Ω λ parameters exhibit the same trend (Ω 2 > Ω 6 > Ω 4 ) for all studied glasses.…”

Section: Judd-ofelt (J-o) Analysismentioning

confidence: 99%

Luminescence characteristics of Dy³⁺ doped sodium alumina borate glass: Role of silver

Koçyiğit

Gökçe

2023

J. Phys. D: Appl. Phys.

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Metallic nanoparticle doped glasses have been studied as promising candidates for various technological applications due to their ability to improve the luminescence properties of rare earth ions. In this work, Dy2O3 and Ag2O co-doped sodium alumina borate glasses were synthesized by conventional melt-quenching technique. Raman analysis verified the existence of [BO3] and [BO4] groups with B–O stretching vibrations in the prepared glasses. Transmission electron microscope images confirmed the presence of spherical Ag nanoparticles, whose average diameter is about 7.60 nm, in H-0.5Dy1Ag glass matrix. The optical and luminescence properties were investigated according to Ag concentrations. The negative value of the bonding parameters, calculated from the absorption spectra, indicates the ionic nature between the Dy3+ ions and its surrounding ligands. In order to determine the nature of the Dy-O bond and the symmetry around the Dy3+ ion environment, Judd–Ofelt intensity parameters (Ωλ, λ=2, 4, 6) were obtained from the absorption spectra. The luminescence spectra obtained under 350 nm excitation exhibits four emission bands at 481 (4F9/2→6H15/2), 572 (4F9/2→6H13/2), 662 (4F9/2→6H11/2), and 750 (4F9/2→6H9/2) nm. The intensity of emission spectra increases with Ag2O content until 1.0 wt% in H-0.5Dy-yAg glasses and then decreases due to the back-energy transfer from Dy3+ to Ag+. The energy transfer mechanism from Ag+ to Dy3+ ion for H-1Ag-xDy glasses were investigated through Forster-Dexter’s theory and were found to be quadrupole-quadrupole type. The various radiative properties were calculated by using Judd-Ofelt intensity parameters and emission spectra. It was found that the 572 nm emission band, located in the yellow region, has higher radiative parameters. As a function of Ag concentration, the Y/B values, Commission Internationale d'Eclairage (CIE) chromaticity coordinates (x,y) and correlated color temperatures (CCT) were evaluated. The CIE chromaticity coordinates and CCT values of all glasses are located in the white light region. The decay time values of 1S0→3D1 transition of Ag+ ions and 4F9/2→6H13/2 transition of Dy3+ ions confirm the energy transfer from Ag+ to Dy3+ ions. Overall, the present study indicates that the synthesized glasses with Ag addition exhibits improved luminescence, making them potential candidate for wLEDs.

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Structural and optical studies on various concentrations of Dy3+-doped lead fluoro-borotellurophosphate glasses for white light and solid-state light applications

D’Silva

Maheshvaran²,

Lourduraj

et al. 2023

J Mater Sci: Mater Electron

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Spectroscopic characteristics of Dy3+ impurities–doped borate-based glasses: Judd–Ofelt calculation

Cited by 29 publications

References 57 publications

Noncytotoxic Dy³⁺‐activated glass emits cool white light for near ultraviolet‐based white light‐emitting diodes, visible lasers, and biomedical applications

Noncytotoxic Dy³⁺‐activated glass emits cool white light for near ultraviolet‐based white light‐emitting diodes, visible lasers, and biomedical applications

Luminescence characteristics of Dy³⁺ doped sodium alumina borate glass: Role of silver

Structural and optical studies on various concentrations of Dy3+-doped lead fluoro-borotellurophosphate glasses for white light and solid-state light applications

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Spectroscopic characteristics of Dy3+ impurities–doped borate-based glasses: Judd–Ofelt calculation

Cited by 29 publications

References 57 publications

Noncytotoxic Dy3+‐activated glass emits cool white light for near ultraviolet‐based white light‐emitting diodes, visible lasers, and biomedical applications

Noncytotoxic Dy3+‐activated glass emits cool white light for near ultraviolet‐based white light‐emitting diodes, visible lasers, and biomedical applications

Luminescence characteristics of Dy3+ doped sodium alumina borate glass: Role of silver

Structural and optical studies on various concentrations of Dy3+-doped lead fluoro-borotellurophosphate glasses for white light and solid-state light applications

Contact Info

Product

Resources

About

Noncytotoxic Dy³⁺‐activated glass emits cool white light for near ultraviolet‐based white light‐emitting diodes, visible lasers, and biomedical applications

Noncytotoxic Dy³⁺‐activated glass emits cool white light for near ultraviolet‐based white light‐emitting diodes, visible lasers, and biomedical applications

Luminescence characteristics of Dy³⁺ doped sodium alumina borate glass: Role of silver