The Influence of Zn&lt;sub&gt;3&lt;/sub&gt;(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;:Mn - Luminophores Synthesis Conditions on their Surface and Luminescent Features

Minakova, T. S.; Sychov, M. M.; Bakhmetyev, Vadim V.; Eremina, N. S.; Богданов, С. П.; Zyatikov, I.A.; Minakova, Ludmila Yu.

doi:10.4028/www.scientific.net/amr.872.106

Cited by 8 publications

(2 citation statements)

References 3 publications

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“…In this study, much attention was paid to the investigation of the phosphors surface properties without a detailed consideration of the effect of the matrix structure on the corresponding luminescent transitions. In the previous studies [19][20][21], we have shown that acid-base active sites, dispersity, and porosity reflect the imperfection of the solids surface structure and affect the luminescent properties of materials sensitive to the surface state. This study shows that the phosphors based on YVO 4 had more intense PL and increased brightness compared with the samples based on YPO 4 .…”

Section: Excitation and Luminescencementioning

confidence: 95%

High Efficient YVPO4 Luminescent Materials Activated by Europium

et al. 2019

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YPO4:Eu, YVO4:Eu, and YVPO4:Eu based phosphors with various Eu(III) activator contents and phosphate-vanadate ratios were synthesized by the self-propagating high-temperature synthesis method. The samples were characterized by scanning electron microscopy, nitrogen sorption, acid-base indicators and photoluminescence. The particle surface features with a finely dispersed structure comprising all the involved elements. The pore structure and the specific surface areas of the samples were different depending on the compositions of the samples. The most finely dispersed sample was YVO4:Eu samples. The specific surface areas of the YPO4:Eu samples were 10 to 15 times greater than those of vanadate samples. The phosphors samples had a slightly basic (YVO4:Eu, YVPO4:Eu) or slightly acidic (YPO4:Eu) properties of the surface with different contents of Lewis and Brönsted sites. The differences in the compositions and acid-base state resulted in the difference in the intensity and brightness of the photoluminescence (PL) of the samples. The yttrium-phosphate-vanadate phosphors of the mixed YVxP1−xO4-Eu had higher brightness and PL intensity than those samples with similar phosphate as well as vanadate phosphors.

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Section: Excitation and Luminescencementioning

confidence: 95%

High Efficient YVPO4 Luminescent Materials Activated by Europium

et al. 2019

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“…In our previous studies [8][9][10], the phosphors Zn3(PO4)2:Mn 2+ , NaBaPO4:Eu 2+ , Y2O3:Eu 3+ , Y3Al5O12:Eu 3+ were proposed for use in photodynamic therapy of oncological diseases. The main problem in obtaining these phosphors is the need for high-temperature (over 800°C) synthesis, which leads to agglomeration of phosphor nanoparticles into large associates.…”

Section: Introductionmentioning

confidence: 99%

Solvothermal Synthesis of YF<sub>3</sub>:Ce<sup>3+</sup> Nanophosphors for Medical Applications

Dorokhina

Bakhmetyev²,

Sychov³

et al. 2021

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In this paper, the time effect of hydrothermal synthesis on YF3 morphology particles is considered. The work was carried out on X-ray-excited YF3:Ce3+ phosphors. The synthesis was carried out by the hydrothermal method, since it avoids high temperatures leading to particle agglomeration. The first stage of research consisted in identifying the most favorable medium for obtaining the required phase and size - water or organic matter (ethylene glycol and ethanol). Research has shown that ethylene glycol has all the advantages: it prevents agglomeration, allows us to get the required phase. Hydrothermal synthesis of YF3 samples to determine the optimal synthesis time was carried out according to the same scheme - in an organic medium of ethylene glycol without using stabilizers for 4, 8, 12, 16, 20 hours. Our study showed that it is possible to obtain a YF3 sample that meets the necessary requirements (including nanoscale) within 16 hours, moreover, without the use of stabilizers. In parallel with the study of the synthesis duration, an experiment was carried out on the effect of various stabilizers on the properties of the YF3:Ce3+ phosphors (5%). The synthesized nanophosphors possessed effective X-ray luminescence with a maximum in the region of 300 nm, which makes it possible to use them in the composition of preparations for PDT.

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