Structural and luminescence properties of Y2O3:Eu3+ core–shell nanoparticles

Bohus, Gabriella; Hornok, Viktória; Oszkó, A.; Vértes, A.; Кузманн, Э.; Dékány, Imre

doi:10.1016/j.colsurfa.2012.04.010

Cited by 18 publications

(12 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mainpeaks located in 1134.0 eV and 1163.9 eV are attributed to the Eu 3+ . Two small shake down peaks sited at 1124.4 eV and 1154.4 eV are attributed to Eu 2+ [27,28]. This suggests that Eu ions in as-synthesized samples are mainly exist in +3 valence, simultaneously with a small number of +2 valence.…”

Section: Morphology and Structurementioning

confidence: 88%

Synthesis, morphology, photoluminescence and photocatalytic properties of yolk–shell Au@Y2O3:Eu3+ sub-microspheres

Zhao

et al. 2015

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Section: Morphology and Structurementioning

confidence: 88%

Synthesis, morphology, photoluminescence and photocatalytic properties of yolk–shell Au@Y2O3:Eu3+ sub-microspheres

Zhao

et al. 2015

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…Y

_{2}

_{3}

:Eu

^{3 +}

nanoparticles in spherical morphology are used for flat-panel displays [67]. Lu

_{2}

_{3}

:Eu is a very attractive host for scintillators [68] or x-ray phosphors [69], due to a high density of lutetia, which ensures that ionizing radiation is efficiently absorbed in relatively thin layers of lutetia-based phosphors.…”

Section: The Lanthanide Ions Eu2+/eu3+ and Their Optical Propertiesmentioning

confidence: 99%

“…Bohus et al [67] and Kuzmann et al [116] investigated monodisperse Y

_{2}

_{3}

:Eu

^{3 +}

spherical nanoparticles as well as Y

_{2}

_{3}

@Eu

^{3 +}

core-shell structures. The core-shell nanoparticles had an isomer shift of 1.03 mm/s, which agrees with that found for pure Eu

_{2}

_{3}

and is independent of the Eu

^{3 +}

doping level.…”

Section: Materials Overviewmentioning

confidence: 99%

Characterization of Luminescent Materials with 151Eu Mössbauer Spectroscopy

Steudel

Johnson

et al. 2018

Materials

View full text Add to dashboard Cite

The application of Mössbauer spectroscopy to luminescent materials is described. Many solids doped with europium are luminescent, i.e., when irradiated with light they emit light of a longer wavelength. These materials therefore have practical applications in tuning the light output of devices like light emitting diodes. The optical properties are very different for the two possible valence states Eu2+ and Eu3+, the former producing ultraviolet/visible light that shifts from violet to red depending on the host and the latter red light, so it is important to have a knowledge of their behavior in a sample environment. Photoluminescence spectra cannot give a quantitative analysis of Eu2+ and Eu3+ ions. Mössbauer spectroscopy, however, is more powerful and gives a separate spectrum for each oxidation state enabling the relative amount present to be estimated. The oxidation state can be identified from its isomer shift which is between −12 and −15 mm/s for Eu2+ compared to around 0 mm/s for Eu3+. Furthermore, within each oxidation state, there are changes depending on the ligands attached to the europium: the shift is more positive for increased covalency of the bonding ligand X, or Eu concentration, and decreases for increasing Eu–X bond length.

show abstract

“…Zhao [19]. Coprecipitation method is usually used to synthesise different structures such as core-shell structure [20,21], yolk-shell structure [22,23] and hollow sphere [5,14] via a urea-based homogeneous precipitation technique with microspheres as templates. The important characteristics of mesoporous material are large interface or surface areas and nanosize (2-50 nm) mesoporous structure.…”

Section: Introductionmentioning

confidence: 99%

Facile preparation and fluorescence enhancement of mesoporous Eu-doped-Y2O3 phosphors

Chen

Tao

Yang

et al. 2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Mesoporous europium-doped yttrium oxide phosphors were successfully synthesized by a simple Pechini sol-gel method. The prepared powders were characterized by X-ray diffraction, scanning electron microscopy, Surface area and pore size analyzer and fluorescence spectrophotometer. The XRD spectrum of the calcined samples confirm the presence of Y 2 O 3 . The surface area and pore size analyzer was employed to demonstrate the existence of mesoporous structure in these samples. The room temperature photoluminescence (PL) emissions of Y 2 O 3 :Eu samples can be observed under 245 nm excitation. PL results show that the emission intensity of as-prepared mesoporous Y 2 O 3 :Eu phosphors are higher than that of particles without special structures. Large surface area and pores play an important role in the increasing of PL intensity. The intensity ratio between 5 D 0 ? 7 F 2 and 5 D 0 ? 7 F 1 transitions which related to the local environment of Eu 3? were also studied.

show abstract

Structural and luminescence properties of Y2O3:Eu3+ core–shell nanoparticles

Cited by 18 publications

References 44 publications

Synthesis, morphology, photoluminescence and photocatalytic properties of yolk–shell Au@Y2O3:Eu3+ sub-microspheres

Synthesis, morphology, photoluminescence and photocatalytic properties of yolk–shell Au@Y2O3:Eu3+ sub-microspheres

Characterization of Luminescent Materials with 151Eu Mössbauer Spectroscopy

Facile preparation and fluorescence enhancement of mesoporous Eu-doped-Y2O3 phosphors

Contact Info

Product

Resources

About