Structural and photoluminescence properties of Dy3+ co-doped and Eu2+ activated MAl2O4 (M=Ba,Ca,Sr) nanophosphors

Dejene, F.B.; Kebede, Mesfin Abayneh; Redi‐Abshiro, Mesfin; Kgarebe, Boitumelo

doi:10.1016/j.optmat.2012.11.024

Cited by 34 publications

(11 citation statements)

References 19 publications

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“…However, unfiltered Xe-arc take in account a great contribution of short ultraviolet radiation that is completely different in comparison to solar or artificial indoor illumination. Nonetheless, the majority of decay curves are taken when the sample is irradiated with monochromatic light at 350, 365 and 375 nm for 5 and 10 min 22–29 and by a solar simulator in a lesser extent 30 . Usually, arbitrary units are employed to measure the photoluminescence intensity and the afterglow decay, so it is difficult to compare experimental measures obtained by different research groups.…”

Section: Resultsmentioning

confidence: 99%

Precise Tuning of the Nanostructured Surface leading to the Luminescence Enhancement in SrAl2O4 Based Core/Shell Structure

Rojas-Hernández

Rubio-Marcos

Serrano

et al. 2017

Sci Rep

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Intensive research has been focused on the synthesis of long-lasting SrAl2O4:EuDy in luminescent materials field. Traditionally, SrAl2O4:EuDy is synthesized in bulk form by solid state. However, their development remains restrained due to this technique is not compatible with large-scale production, sustainability and nanometer-scale requirements. Despite nano-range particles have been obtained by chemical routes, photoluminescence response decreases and application became unpractical. It remains a challenge to synthesize nonrare-earth (RE) phosphors with high photoluminescence. One major challenge for the luminescent materials community is to devise methods to deliver innovative, sustainable and cost effective solutions for the reduction of RE because of the lack of RE availability. Here, we suggest a solution based on molten salts, obtaining nanosheets or micro/nanostructured SrAl2O4:Eu, Dy particles with core-shell structure, employing only 50% of standard amounts of RE. Core-size and shell thickness and crystallinity can be tuned by post-thermal treatment, through which can be modulated the Eu+2 fraction. We find that our methodology leads the functional features of the analogous micron counterpart. These results can be considered a great achievement to scale-up the process. Besides, the harmful collateral effect of nanotechnology must be addressed by using new safe by design core-shell nanostructures.

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Section: Resultsmentioning

confidence: 99%

Precise Tuning of the Nanostructured Surface leading to the Luminescence Enhancement in SrAl2O4 Based Core/Shell Structure

Rojas-Hernández

Rubio-Marcos

Serrano

et al. 2017

Sci Rep

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“…The interconfigurational transition was observed to be dependent on the molar ratio of glycine:urea fuels. Glycine fuel favored Eu 2+ formation in SrB 4 O 7 host lattice prepared through this approach . Sr 2 Mg(BO 3 ) 2 :Eu 2+ emitted yellow, Ba 2 Mg(BO 3 ) 2 :Eu 2+ emitted red, and Al 4 B 2 O 9 :Eu 2+ emitted blue.…”

Section: Nanophosphors For Microledsmentioning

confidence: 93%

Impact of Lanthanide Nanomaterials on Photonic Devices and Smart Applications

Zhou

Leaño

Liu³

et al. 2018

Small

146

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Half a century after its initial emergence, lanthanide photonics is facing a profound remodeling induced by the upsurge of nanomaterials. Lanthanide-doped nanomaterials hold promise for bioapplications and photonic devices because they ally the unmatched advantages of lanthanide photophysical properties with those arising from large surface-to-volume ratios and quantum confinement that are typical of nanoobjects. Cutting-edge technologies and devices have recently arisen from this association and are in turn promoting nanophotonic materials as essential tools for a deeper understanding of biological mechanisms and related medical diagnosis and therapy, and as crucial building blocks for next-generation photonic devices. Here, the recent progress in the development of nanomaterials, nanotechnologies, and nanodevices for clinical uses and commercial exploitation is reviewed. The candidate nanomaterials with mature synthesis protocols and compelling optical uniqueness are surveyed. The specific fields that are directly driven by lanthanide doped nanomaterials are emphasized, spanning from in vivo imaging and theranostics, micro-/nanoscopic techniques, point-of-care medical testing, forensic fingerprints detection, to micro-LED devices.

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“…The sample showed decay and a large AG property when the phosphors were efficiently excited by UV light. The decay behavior can be analyzed using a curve‐fitting procedure relying on the following triple exponential equation :

I = D_{1} ((),, - \frac{t}{τ_{1}}) + D_{2} ((),, - \frac{t}{τ_{2}}) + D_{3} ((),, - \frac{t}{τ_{3}})

…”

Section: Resultsmentioning

confidence: 99%

Effect of UV irradiation on different types of luminescence of SrAl₂O₄:Eu,Dy phosphors

Jha

2016

Luminescence

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This paper reports the luminescence behavior of Sr Al O :Eu ,Dy phosphors under UV-irradiation. The effect of UV-irradiation on afterglow (AG), thermoluminescence (TL) and mechanoluminescence (ML) of Sr Al O :Eu ,Dy phosphors is investigated. The space group of Sr Al O :Eu ,Dy phosphors is monoclinic P2 . The prepared phosphors exhibit a long AG, intense TL and ML. It is found that the AG, ML intensity and TL increase with increasing duration of irradiation time. The ML intensity decreases with successive impact of the load onto the phosphors, whereby the diminished ML intensity can be recovered by UV-irradiation. Copyright © 2016 John Wiley & Sons, Ltd.

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Structural and photoluminescence properties of Dy3+ co-doped and Eu2+ activated MAl2O4 (M=Ba,Ca,Sr) nanophosphors

Cited by 34 publications

References 19 publications

Precise Tuning of the Nanostructured Surface leading to the Luminescence Enhancement in SrAl2O4 Based Core/Shell Structure

Precise Tuning of the Nanostructured Surface leading to the Luminescence Enhancement in SrAl2O4 Based Core/Shell Structure

Impact of Lanthanide Nanomaterials on Photonic Devices and Smart Applications

Effect of UV irradiation on different types of luminescence of SrAl₂O₄:Eu,Dy phosphors

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Structural and photoluminescence properties of Dy3+ co-doped and Eu2+ activated MAl2O4 (M=Ba,Ca,Sr) nanophosphors

Cited by 34 publications

References 19 publications

Precise Tuning of the Nanostructured Surface leading to the Luminescence Enhancement in SrAl2O4 Based Core/Shell Structure

Precise Tuning of the Nanostructured Surface leading to the Luminescence Enhancement in SrAl2O4 Based Core/Shell Structure

Impact of Lanthanide Nanomaterials on Photonic Devices and Smart Applications

Effect of UV irradiation on different types of luminescence of SrAl2O4:Eu,Dy phosphors

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Effect of UV irradiation on different types of luminescence of SrAl₂O₄:Eu,Dy phosphors