Influence of Ag nano particles on spectroscopic and luminescence properties of Dy3+ doped borate glasses

Ande, Ashok; Bhemarajam, J.; Kanneboina, Venkanna; Swapna,; Prasad, M.

doi:10.1016/j.jnoncrysol.2021.120702

Cited by 10 publications

(6 citation statements)

References 44 publications

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“…The XRD profiles of different concentrations of Ag in Dy 3+ doped H-0.5Dy-yAg glasses are displayed in figure 1(b). The presence of a broad scattering peak at 2Θ = 24 • and 44 • presents the characteristic long-range disorder structure and verify the amorphous nature of the glass matrix [27]. In addition, no diffraction peak of Ag NPs was observed from the XRD pattern of the studied glasses due to the small Ag 2 O concentration.…”

Section: Structural Analysissupporting

confidence: 54%

“…The bands centered at 635 and 662 cm -1 are owing to the B-O-B stretching vibrations in metaborate ring [33]. Band at 907 cm −1 relates to the B-O stretching vibrations of [BO 4 ] in orthoborate units [27]. The Raman bands centered at 1105, 1180, 1248, 1310, 1396, 1465 and 1546 cm −1 are located in the third region (1050-1600 cm −1 ).…”

Section: Structural Analysismentioning

confidence: 97%

“…Among these bands, 795 cm −1 has the highest intensity and is attributed to the vibration of six-membered rings containing both [BO 3 ] and [BO 4 ] units [34]. The band at ∼434 cm −1 is related to B-O-B of borate unit [27]. The bands centered at 635 and 662 cm -1 are owing to the B-O-B stretching vibrations in metaborate ring [33].…”

Section: Structural Analysismentioning

confidence: 99%

“…Dy 3+ ions can be used for white light applications because of their intense emission in blue and yellow region [18]. There are very limited number of studies conducted on Dy 3+ -Ag and Dy 3+ -RE-Ag doped glasses such as borotellurite [8], lead borate [19], magnesium zinc sulfophosphate [20], phosphate [21], tellurite [22][23][24], zinc-magnesium tellurite [25], heavy metal germanium tellurite [26], soda-lime silicate [15], borate [27] and borosilicate [28] for photonic applications.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Structural Analysissupporting

confidence: 54%

Section: Structural Analysismentioning

confidence: 97%

Section: Structural Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Koçyiğit

Gökçe

2023

J. Phys. D: Appl. Phys.

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“…However, at higher concentrations, the luminescence intensity begins to decline. Because the intermolecular separation decreased at higher concentrations and Dy 3+ ions were so close to each other, there was a strong interaction of excitation energy exchange that took place among the Dy 3+ ions that could lead to concentration quenching [14, 19–21].…”

Section: Resultsmentioning

confidence: 99%

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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Investigation on single rare earth Dy3+ doped silver boro-phosphate glass for radiation shielding and led application

Kalpana,

Vinothkumar,

Senthil

2024

Appl. Phys. A

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Influence of Ag nano particles on spectroscopic and luminescence properties of Dy3+ doped borate glasses

Cited by 10 publications

References 44 publications

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

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

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

Investigation on single rare earth Dy3+ doped silver boro-phosphate glass for radiation shielding and led application

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Influence of Ag nano particles on spectroscopic and luminescence properties of Dy3+ doped borate glasses

Cited by 10 publications

References 44 publications

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

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

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

Investigation on single rare earth Dy3+ doped silver boro-phosphate glass for radiation shielding and led application

Contact Info

Product

Resources

About

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

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

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