Eu3+ concentration effect on luminescence properties of YAG:Eu3+ nanoparticles

Kolesnikov, Ilya E.; Tolstikova, D.V.; Курочкин, А. В.; Manshina, Alina; Михайлов, М. Н.

doi:10.1016/j.optmat.2014.06.015

Cited by 56 publications

(10 citation statements)

References 25 publications

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“…In fact, our NPs have PLQYs comparable to, and even higher than that of YAG:Eu NPs. [55] Therefore, we argue that our La 2 Hf 2 O 7 :5mol%Eu 3+ NPs possess a PLQY that is competitive to other nanophosphors.…”

Section: Photoluminescencementioning

confidence: 85%

Structural, photoluminescence and radioluminescence properties of Eu3+ doped La2Hf2O7 nanoparticles

Wahid

Pokhrel

Mao

2017

Journal of Solid State Chemistry

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This study presents the structural, optical, and radioluminescent characterization of newly synthesized europium-doped lanthanum hafnate (La 2 Hf 2 O 7 :xmol%Eu 3+ , x = 0 to 35) nanoparticles (NPs) for use as phosphors and scintillation materials. Samples prepared through a combined co-precipitation and molten salt synthetic process were found to crystalize in the pyrochlore phase, a radiation tolerant structure related to the fluorite structure. These samples exhibit red luminescence under ultraviolet and X-ray excitation. Under these excitation wavelengths, the optical intensity and quantum yield of the La 2 Hf 2 O 7 :xmol%Eu 3+ NPs depend on the Eu 3+ concentration and are maximized at 5%. It is proposed that there is a trade-off between the quenching due to defect states/crossrelaxation and a high dopant concentration. An optimal dopant concentration allows La 2 Hf 2 O 7 :5mol%Eu 3+ NPs to show the best luminescent properties of all the samples.

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Section: Photoluminescencementioning

confidence: 85%

Structural, photoluminescence and radioluminescence properties of Eu3+ doped La2Hf2O7 nanoparticles

Wahid

Pokhrel

Mao

2017

Journal of Solid State Chemistry

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“…In modern photonics, the crystals containing europium ions are of particular interest because of the efficient red emission provided by Eu 3+ ions under the short-wavelength excitation and this property is extremely needed for the WLED devices and other optical systems [1][2][3][4][5]. By now, a lot of different Eu 3+ -doped phosphors with a complex structure have been proposed and their spectroscopic properties have been evaluated [6][7][8][9][10][11][12]. However, in the solid solutions, the Eu 3+ doping level is commonly low to avoid the concentration-quenching effects and, respectively, the crystallographic positions of Eu 3+ ions may be not evident.…”

Section: Introductionmentioning

confidence: 99%

Exploration of structural, vibrational and spectroscopic properties of self-activated orthorhombic double molybdate RbEu(MoO4)2 with isolated MoO4 units

Atuchin

Aleksandrovsky

Базаров

et al. 2019

Journal of Alloys and Compounds

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RbEu(MoO4)2 is synthesized by the two-step solid state reaction method. The crystal structure of RbEu(MoO4)2 is defined by Rietveld analysis in space group Pbcn with cell parameters a=5.13502(5), b=18.8581(2) and c=8.12849(7) Å, V=787.13(1) Å 3 , Z=4 (RB=0.86%). This molybdate possesses its phase transition at 817 K and melts at 1250K. The Raman spectra were measured with the excitation at =1064 and 514.5nm. The photoluminescence spectrum is evaluated under the excitation at 514.5nm. The absolute domination of hypersensitive 5 D0→ 7 F2 transition is observed. The ultranarrow 5 D0→ 7 F0 transition in RbEu(MoO4)2 is positioned at 580.2nm being 0.2nm blue shifted, with respect to that in Eu2(MoO4)3.

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“…The intense peak at 712 nm, due 5 D 0 → 7 F 4 electric-dipole transition, is not very well understood. Some works have stated that this transition is dominant with respect to 5 D 0 → 7 F 1 and 5 D 0 → 7 F 2 [20,22]. This behavior has been explained by Sá Ferreira et al as a consequence of the chemical environment, as highly polarizable sites occupied by Eu 3+ ions contribute to the increase of the intensity parameter, Ω λ [23].…”

Section: Methodsmentioning

confidence: 85%