Photoluminescent properties of ZrO2: Tm3+, Tb3+, Eu3+ powders—A combined experimental and theoretical study

Lovisa, L.X.; Andrés, Juán; Gracia, Lourdes; Li, M.S.; Paskocimas, C. A.; Bomio, M. R. D.; Araújo, V. D.; Longo, Elson; Motta, F. V.

doi:10.1016/j.jallcom.2016.11.341

Cited by 52 publications

(26 citation statements)

References 84 publications

(36 reference statements)

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“…The specific conditions must be fulfilled for this mechanism to take place. Note the following points: (I) the emission range of D is partially superimposed on the absorption range of A, and (II) the distance (Rc) between D and A must be sufficiently short, since the energy transfer efficiency is proportional to 1 Rc 6 , to allow the interaction of the multipole-multipole emission bands of material [75,76]. The Forster resonance energy transfer can usually happen at distances of up to 100 Å. Dexter (also known as exchange or coalitional energy transfer) is another dynamic quenching mechanism.…”

Section: Resultsmentioning

confidence: 99%

Structure, morphology and photoluminescence emissions of ZnMoO4: RE 3+=Tb3+ - Tm3+ - X Eu3+ (x = 1, 1.5, 2, 2.5 and 3 mol%) particles obtained by the sonochemical method

Lovisa

Oliveira

Andrés

et al. 2018

Journal of Alloys and Compounds

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ZnMoO 4 and ZnMoO 4 : RE 3þ ¼ 1% Tb 3þ , 1% Tm 3þ , x Eu 3þ (x ¼ 1, 1.5, 2, 2.5 and 3 mol%) particles were prepared by a sonochemical method. The influence of the dopant content on photoluminescent behavior was investigated. The X-ray diffraction results confirmed the formation of the a-ZnMoO 4 phase with a triclinic crystalline structure. The influence of the chemical compositions on photoluminescence emissions has been studied and the results clearly show the specific emissions of Tb 3þ and Eu 3þ , simultaneously, with a strong contribution of the matrix. Band gap values are in the range of 3.55e4.25 eV. From the values calculated for the CIE coordinates, it was observed that this material develops an emission tendency in the orange-red region. It has been demonstrated for the first time that the sample ZnMoO 4 : 1% Tb 3þ , 1% Tm 3þ , 2% molEu 3þ , presented higher photoluminescence intensity. At higher concentrations of RE 3þ , the quenching effect was observed. The morphology of samples are interpreted based on a comparative analysis of the calculated and experimental field emission scanning electron microscopy (FE-SEM) images. First-principle calculations at a density functional theory level were performed to obtain the values of surface energies and relative stability of the (120), ( 001), ( 011), (201), and (100) surfaces by employing the Wulff construction. A complete map of the available morphologies of ZnMoO 4 and ZnMoO 4 :12.5%molEu 3þ is obtained and a possible explanation for the transformation processes is provided in which the experimental and theoretical morphologies can match. The present study offers a fundamental knowledge that is expected to enable the fabrication of ZnMoO 4 -based phosphor materials with a controllable emission peak shift and intensity.

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Section: Resultsmentioning

confidence: 99%

Structure, morphology and photoluminescence emissions of ZnMoO4: RE 3+=Tb3+ - Tm3+ - X Eu3+ (x = 1, 1.5, 2, 2.5 and 3 mol%) particles obtained by the sonochemical method

Lovisa

Oliveira

Andrés

et al. 2018

Journal of Alloys and Compounds

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“…Meanwhile, the annealed samples show absorption peaks at 214.8 nm (5.77 eV), 341.6 nm (3.63 eV), 360.1 nm (3.44 eV), 457.7 nm (2.71 eV) and 494.0 nm (2.51 eV) (figure 3(a)). The peak at 212.9/214.8 nm is due to the zirconia band to band transition [8,[14][15][16]. The 291.2 nm and 341.6 nm absorption peaks are assigned to the d-d transition states of impurity Ti 3+ ion [17].…”

Section: Optical Analysismentioning

confidence: 98%

Unusual blue and red luminescence properties of BaO–ZrO₂ nanocrystals

Ahemen

Kroon

Sha’Ato

et al. 2020

Mater. Res. Express

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BaO-ZrO 2 nanocrystals were synthesized using the chemical bath deposition technique and then subjected to post-synthesis annealing between 500 and 900°C. X-ray diffraction patterns showed the amorphous structure for as-synthesized sample, while annealed samples show either disordered tetragonal phase or a mixture of tetragonal and monoclinic phases at high temperatures. The emission spectrum displays blue emission band for the as-synthesized sample with peak maximum at 434 nm. All annealed samples showed both blue (434 nm) and red (710 nm) emission bands upon excitation at 248 and 360 nm. Samples excited at 310 nm produced only the red emission band centered at 710 nm, which decreased monotonically with increasing temperature and was completely quenched at 900°C. CIE results show the phosphor is capable of producing blue, red and white light depending on the excitation wavelength chosen and the post-synthesis heat treatment temperature. The synthesized phosphor is cost-effective and can be applied in display and other lighting technologies.

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“…Nanocrystalline zirconia is the most suitable host matrix for the creation of high-performance solid-state light-emitting devices based on Ln 3+ ions due to its high refractive index, the band gap in the range from 4 to 6 eV, transparency in the visible and infrared spectral regions, as well as low frequency of phonons (470 cm −1 ) [6,7]. To date, nanophosphors based on ZrO 2 have been used in LEDs [8], fuel cells [9], solar panels [10], gas sensors [11], and photocatalytic systems [12,13]. The photostability and high lifetime of Ln 3+ (the range of milliseconds) ion radiation in the ZrO 2 biologically-inert matrix made it possible to use such luminescent markers for medical purposes for detecting, visualizing, diagnosing and treating diseases [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

The influence of chemical prehistory on the structure, photoluminescent properties, surface and biological characteristics of Zr0.98Eu0.02O1.99 nanophosphors

Bugrov¹,

Smyslov²,

Zavialova³

et al. 2019

Nanosystems: Phys. Chem. Math.

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ZrO 2 nanoparticles doped with 2 mol.% of EuO 1.5 were obtained from solutions of inorganic salts, zirconium alkoxide and chelating compounds under hydro and solvothermal conditions. The phase compositions of the synthesized nanophosphors were determined using the methods of X-ray diffraction, photoluminescence and Raman spectroscopy. The changes in a particle size, the value of the specific surface area and its charge depending on the conditions of preparation (the type of solvent, isothermal exposure time) and the precursor nature used in the synthesis were considered. It was found that Zr 0.98 Eu 0.02 O 1.99 nanoparticles with a high content of the monoclinic phase, synthesized from zirconium and europium acetylacetonates, have the highest luminescence efficiency. At the same time, the maximum photoluminescence lifetime and the least cytotoxicity were characteristic of crystal phosphors with a more symmetrical crystal lattice of the host matrix, as well as a high surface area/volume ratio.

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Photoluminescent properties of ZrO2: Tm3+, Tb3+, Eu3+ powders—A combined experimental and theoretical study

Cited by 52 publications

References 84 publications

Structure, morphology and photoluminescence emissions of ZnMoO4: RE 3+=Tb3+ - Tm3+ - X Eu3+ (x = 1, 1.5, 2, 2.5 and 3 mol%) particles obtained by the sonochemical method

Structure, morphology and photoluminescence emissions of ZnMoO4: RE 3+=Tb3+ - Tm3+ - X Eu3+ (x = 1, 1.5, 2, 2.5 and 3 mol%) particles obtained by the sonochemical method

Unusual blue and red luminescence properties of BaO–ZrO₂ nanocrystals

The influence of chemical prehistory on the structure, photoluminescent properties, surface and biological characteristics of Zr0.98Eu0.02O1.99 nanophosphors

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Photoluminescent properties of ZrO2: Tm3+, Tb3+, Eu3+ powders—A combined experimental and theoretical study

Cited by 52 publications

References 84 publications

Structure, morphology and photoluminescence emissions of ZnMoO4: RE 3+=Tb3+ - Tm3+ - X Eu3+ (x = 1, 1.5, 2, 2.5 and 3 mol%) particles obtained by the sonochemical method

Structure, morphology and photoluminescence emissions of ZnMoO4: RE 3+=Tb3+ - Tm3+ - X Eu3+ (x = 1, 1.5, 2, 2.5 and 3 mol%) particles obtained by the sonochemical method

Unusual blue and red luminescence properties of BaO–ZrO2 nanocrystals

The influence of chemical prehistory on the structure, photoluminescent properties, surface and biological characteristics of Zr0.98Eu0.02O1.99 nanophosphors

Contact Info

Product

Resources

About

Structure, morphology and photoluminescence emissions of ZnMoO4: RE 3+=Tb3+ - Tm3+ - X Eu3+ (x = 1, 1.5, 2, 2.5 and 3 mol%) particles obtained by the sonochemical method

Structure, morphology and photoluminescence emissions of ZnMoO4: RE 3+=Tb3+ - Tm3+ - X Eu3+ (x = 1, 1.5, 2, 2.5 and 3 mol%) particles obtained by the sonochemical method

Unusual blue and red luminescence properties of BaO–ZrO₂ nanocrystals