Photoluminescence properties of Eu<sup>3+</sup> ions in yttrium oxide nanoparticles: defect vs. normal sites

Kolesnikov, Ilya E.; Povolotskiy, Alexey V.; Mamonova, Daria V.; Lähderanta, E.; Manshina, Alina; Михайлов, М. Н.

doi:10.1039/c6ra16814k

Cited by 61 publications

(32 citation statements)

References 63 publications

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“…The composition dependent optimum luminescence behavior was reported previously in the Y 2 O 3 : Eu 3+ system. 27 It was pointed out that the optimum lumine- Table 2. scence was due to the following two competitive effects: an increase of luminescence center numbers and resulting radiative recombination, and an increase of the cross-relaxation probability which enhances the efficiency of the non-radiative processes.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Eu(iii) acetylacetonate-doped well-defined titania particles with efficient photoluminescence properties

2018

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The aggregation/dispersion of luminescent species is a critical factor that determines their luminescence properties. In this study, europium(iii) acetylacetonate (Eu(acac)) was doped into a titania matrix to form Eu(acac)-doped titania particles with well-defined size and shape through a microreactor-based sol-gel approach. The morphology and structure of the as-synthesized products were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, scanning transmission electron microscopy and X-ray diffraction measurements. The Eu/Ti value of the products varied in the range from 0.125 to 5.0 and the resulting luminescence properties were examined. It should be noted that there was an optimum Eu/Ti value that exhibited the strongest luminescence. A possible reason for this phenomenon can be explained on the basis of a balance between the inter-molecular distance of Eu(acac) and its doped amount. The effects of the crystal phase of the titania matrix on luminescence behavior were also investigated. As a result, Eu(acac)-doped amorphous titania demonstrated more efficient luminescence than that after calcined at 550 °C for 6 h to convert amorphous to anatase probably because of the aggregation of Eu species on the crystallite surface. The stability of the present Eu(acac)-doped titania was confirmed by preparing thin films on a glass substrate and by applying UV/ozone treatment. As compared to bare Eu(acac), degradation in luminescence was suppressed in the case of Eu(acac)-doped titania. Thus, the present titania-based hybrid with controlled Eu(acac) doping is useful as a stable, luminescent material for optical, biological and environmental applications.

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Section: Resultsmentioning

confidence: 99%

Preparation of Eu(iii) acetylacetonate-doped well-defined titania particles with efficient photoluminescence properties

2018

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“…Позже в работах [49,52] [57,58]. Увеличение отношения поверхности к объему в наночастицах приводит к образованию большого количества поверхностных дефектов, которые могут представлять собой безызлучательные каналы релаксации электронных возбуждений.…”

Section: симметрия локального окружения рзи в нанокристаллахunclassified

Люминесцентные Наноматериалы, Допированные Редкоземельными Ионами, И Перспективы Их Биомедицинского Применения (Обзор)

Бажукова¹,

Пустоваров²,

Мышкина³

et al. 2020

Журнал Технической Физики

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Luminescent nanomaterials doped with rare-earth elements are characterized by such physicochemical properties as long-lived luminescence, large Stokes or anti-Stokes shifts, narrow emission bands, high photostability and low toxicity. These materials can be considered as a new generation of biosensors along with conventional molecular probes, such as organic dyes, quantum dots and chelate-based lanthanide probes. In recent years there has been significant interest in the study of functional nanomaterials based on rare earth elements. The purpose of this paper is to provide an overview of recent advances in the development of luminescent inorganic nanoparticles doped with rare earth elements which could be used for biomedical applications.

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“…Oxides, sulfides, phosphates, and fluoride nanocrystals doped with Eu 3+ are a promising alternative to organic phosphors. Compared with the latter, inorganic nanoparticles doped with Eu 3+ exhibit unique luminescent properties, such as large anti-Stokes shifts, long fluorescence lifetimes, narrow emission bands, high resistance to photobleaching [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Structure and photoluminescent properties of TiO2:Eu3+ nanoparticles synthesized under hydro and solvothermal conditions from different precursors

Zavialova¹,

Bugrov²,

Smyslov³

et al. 2019

Nanosystems: Phys. Chem. Math.

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Crystalline phosphors of Eu 3+-doped titania (TiO 2 :Eu 3+) were prepared by hydro and solvothermal synthesis with luminescent ion concentration of 2 mol.%. The structure and shape of the synthesized nanoparticles were characterized using X-ray powder diffraction, transmission electron microscopy, and Raman spectroscopy. Changes in the emission, excitation spectra, and the intensity decay of the photoluminescence for TiO 2 :Eu 3+ nanoparticles were analyzed their phase composition. The photoluminescence of synthesized TiO 2 :Eu 3+ crystalline phosphors depends on whether the said nanophosphors are formed from organometallic or inorganic precursors under hydro-and solvothermal conditions. Indeed, photoluminescence excitation at wavelengths ranging from 350-550 nm leads to splitting of electron dipole transitions into Stark components according to the symmetry of the Eu 3+ surroundings. Also, both nanoparticles with the anatase structure and phosphors predominantly containing rutile showed very short photoluminescence lifetimes.

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Photoluminescence properties of Eu³⁺ ions in yttrium oxide nanoparticles: defect vs. normal sites

Abstract: The position of activator ions in the lattice has a fundamental effect on the luminescent properties of phosphors.

Cited by 61 publications

References 63 publications

Preparation of Eu(iii) acetylacetonate-doped well-defined titania particles with efficient photoluminescence properties

Preparation of Eu(iii) acetylacetonate-doped well-defined titania particles with efficient photoluminescence properties

Люминесцентные Наноматериалы, Допированные Редкоземельными Ионами, И Перспективы Их Биомедицинского Применения (Обзор)

Structure and photoluminescent properties of TiO2:Eu3+ nanoparticles synthesized under hydro and solvothermal conditions from different precursors

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Photoluminescence properties of Eu3+ ions in yttrium oxide nanoparticles: defect vs. normal sites

Abstract: The position of activator ions in the lattice has a fundamental effect on the luminescent properties of phosphors.

Cited by 61 publications

References 63 publications

Preparation of Eu(iii) acetylacetonate-doped well-defined titania particles with efficient photoluminescence properties

Preparation of Eu(iii) acetylacetonate-doped well-defined titania particles with efficient photoluminescence properties

Люминесцентные Наноматериалы, Допированные Редкоземельными Ионами, И Перспективы Их Биомедицинского Применения (Обзор)

Structure and photoluminescent properties of TiO2:Eu3+ nanoparticles synthesized under hydro and solvothermal conditions from different precursors

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Photoluminescence properties of Eu³⁺ ions in yttrium oxide nanoparticles: defect vs. normal sites