Nanophosphors-Based White Light Sources

Cesaria, Maura; Bartolo, Baldassare Di

doi:10.3390/nano9071048

Cited by 24 publications

(7 citation statements)

References 166 publications

(288 reference statements)

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“…offers important insights into the morphology of the GdPO 4 : Ho 3+ /Nd 3+ nanophosphor material that was annealed at 900°C. It also shows a wide variety of nanoparticle morphologies [26][27][28][29][30] . By displaying the elemental distribution within the nanoparticles, the corresponding compositional ) groups.…”

Section: Sem Analysismentioning

confidence: 99%

Hydrothermal Synthesis, Structural Analysis and Photoluminescence Study of Nd3+/Ho3+ Doped Nanophosphors

Koneru,

Putta,

Bandi

2024

Orient. J. Chem

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Through photoluminescence (PL) investigations, this work shows that the hydrothermal technique of nanomaterial synthesis can successfully produce GdPO4:Nd3+/Ho3+ nanophosphors that display luminescence properties. Down-conversion peaks that produce green and red light arise at certain wavelengths (465, 550, and 674 nm) in response to stimulation at 300 nm. The analysis indicates the P-O CT band of Ho3+ ions and non-radiative resonance energy transfer, which boosts Ho3+ ion emission. GdPO4:Nd3+/Ho3+, an up-conversion (UC) nanophosphor, exhibits efficient luminescence output, with Ho3+ ions being attributed to distinct peaks in the up-conversion emission spectra (465 nm, 550 nm, and 674 nm). Nd3+ ions under strong 808 nm laser irradiation promote these peaks. The study produces well-crystalline nanoparticles with diameters ranging from a few nanometers to tens of nanometers by using the hydrothermal synthesis approach. Under PLE tests, the nanophosphors show an impressive quantum yield, suggesting a wide range of possible uses in the field of nanophosphor materials.

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Section: Sem Analysismentioning

confidence: 99%

Hydrothermal Synthesis, Structural Analysis and Photoluminescence Study of Nd3+/Ho3+ Doped Nanophosphors

Koneru,

Putta,

Bandi

2024

Orient. J. Chem

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“…With the need for miniaturization and better coupling with nanostructured diodes, the search for new nanophosphors with a redder emission has been launched (Cesaria and Di Bartolo, 2019), with the challenge to control the phase purity of these new compounds, as well as their NC size and crystal quality to obtain high PL efficiency.…”

Section: New Nanophosphors For White Led Lightingmentioning

confidence: 99%

Garnet-Type Nanophosphors for White LED Lighting

2020

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In this article we present a short review of the main wet chemical methods developed for the preparation of Ce 3+ -doped Y 3 Al 5 O 12 (YAG:Ce) nanocrystals for their use as nanophosphors in LED lighting technology: combustion, co-precipitation, sol-gel, modified-Péchini, and solvothermal routes. We highlight the key synthesis steps and discuss them in the view of the size, crystal quality, and agglomeration state of the obtained nanocrystals. The photoluminescence internal quantum yield of these nanocrystals is also discussed in light of their morphology. In addition, we report on other garnet-type nanophosphors [Gd 3 Sc 2 Al 3 O 12 , (Gd,Y) 3 Al 5 O 12 , etc.] doped with lanthanide ions (Ce 3+ , but also Eu 3+ or Dy 3+ ) developed with the goal of obtaining a warmer white light. The spectroscopic properties of these nanophosphors, in particular their emission range, is discussed in relation with the doping nature, doping concentration, and crystal field of the host matrices.

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“…Currently, metal-oxide semiconductors doped with lanthanide ions (Ln) are widely used in solid-state lighting technologies in the manufacture of LEDs, lasers, field emission and vacuum fluorescence displays, as well as in the medical field for the visualization of drug delivery systems and monitoring changes in implant structure [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Phosphors with different morphology, formed under hydrothermal conditions on the basis of ZrO2:Eu3+ nanocrystallites

Bugrov¹,

Smyslov²,

Хамова³

et al. 2019

Nanosystems: Phys. Chem. Math.

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Eu 3+-doped ZrO 2 nanostructures in the form of rods, stars, and hollow spheres were prepared by varying hydrothermal conditions. X-ray diffraction, transmission electron microscopy, ultraviolet-visible diffuse reflection spectroscopy, a low-temperature nitrogen adsorption method, Raman spectroscopy and photoluminescence spectra were used to characterize the polymorph modification, surface and optical properties of the Zr 0.98 Eu 0.02 O 2 nanophosphors. The Eu 3+ content in a zirconia monoclinic lattice, remained constant for all types of obtained nanostructures in order to reveal the morphology influence on the efficiency of electronic excitation energy transfer from the host matrix to photoactive centers. The decrease of the average size of the coherent scattering regions in the series rods → stars → hollow spheres, is associated with increasing the specific surface area values. At that, in the photoluminescence spectrum, the splitting of the sublevels associated with the monoclinic lattice 5 D 0 → 7 F 1 disappears.

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Nanophosphors-Based White Light Sources

Cited by 24 publications

References 166 publications

Hydrothermal Synthesis, Structural Analysis and Photoluminescence Study of Nd3+/Ho3+ Doped Nanophosphors

Hydrothermal Synthesis, Structural Analysis and Photoluminescence Study of Nd3+/Ho3+ Doped Nanophosphors

Garnet-Type Nanophosphors for White LED Lighting

Phosphors with different morphology, formed under hydrothermal conditions on the basis of ZrO2:Eu3+ nanocrystallites

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