The crystal field strength parameter and the maximum splitting of the 7F1 manifold of the Eu3+ ion in oxides

Malta, O.L.; Antić-Fidančev, E.; Lemaı̂tre-Blaise, M.; Milicic-Tang, Anita; Taïbi, M.

doi:10.1016/0925-8388(95)01645-7

Cited by 97 publications

(67 citation statements)

References 8 publications

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“…7 F 1 transition, DE max permits the discussion of the interaction potential between the Eu 3þ ions and their nearest neighbors. Based on this maximum splitting, the k ¼ 2 contribution of the crystal-field strength (N v ) can be estimated using the methods developed by Auzel and Malta [174] and Malta et al [175] as: …”

Section: The Particular Case Of the Eu 3r Ionmentioning

confidence: 99%

“…[175] The N v parameter can also be estimated based on the interaction potential between the Eu 3þ ions and their nearest neighbors, which relates the observed Stark energies to the ion-surrounding ligands local symmetry and is written in terms of the phenomenological B q k parameters (k ¼ 2, 4, 6, and Àk q k). The k ¼ 2 contribution is calculated separately, as: [174] …”

Section: The Particular Case Of the Eu 3r Ionmentioning

confidence: 99%

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Lanthanide‐Containing Light‐Emitting Organic–Inorganic Hybrids: A Bet on the Future

et al. 2009

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Interest in lanthanide-containing organic-inorganic hybrids has grown considerably during the last decade, with the concomitant fabrication of materials with tunable attributes offering modulated properties. The potential of these materials relies on exploiting the synergy between the intrinsic characteristics of sol-gel derived hosts (highly controlled purity, versatile shaping and patterning, excellent optical quality, easy control of the refractive index, photosensitivity, encapsulation of large amounts of isolated emitting centers protected by the host) and the luminescence features of trivalent lanthanide ions (high luminescence quantum yield, narrow bandwidth, long-lived emission, large Stokes shifts, ligand-dependent luminescence sensitization). Promising applications may be envisaged, such as light-emitting devices, active waveguides in the visible and near-IR spectral regions, active coatings, and bio-medical actuators and sensors, opening up exciting directions in materials science and related technologies with significant implications in the integration, miniaturization, and multifunctionalization of devices. This review provides an overview of the latest advances in Ln(3+)-containing siloxane-based hybrids, with emphasis on the different possible synthetic strategies, photoluminescence features, empirical determination.

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Section: The Particular Case Of the Eu 3r Ionmentioning

confidence: 99%

Section: The Particular Case Of the Eu 3r Ionmentioning

confidence: 99%

Lanthanide‐Containing Light‐Emitting Organic–Inorganic Hybrids: A Bet on the Future

et al. 2009

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“…Another measurable indicator of the evolution of the nanocrystalline YAG:Eu powders with the annealing temperature is the maximum splitting of the 7 F 1 level, ∆E [19]. In Fig.…”

Section: Methodsmentioning

confidence: 99%

Spectroscopy of Eu:YAG nanopowders

Georgescu

Chinie

Stefan

et al. 2007

Phys. Status Solidi (c)

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YAG:Eu nanopowders were synthesized by a nitrate-citrate sol-gel method. The morphologic modifications produced by thermal treatments at various temperatures were monitored by a series of parameters obtained from the optical fluorescence spectroscopy: intensity ratio of the transitions In contrast with the solid-state reaction which requires high temperatures (> 1600 ºC) [7], powders of YAG doped with various rare earth ions can be obtained by the sol-gel route [8][9][10][11][12] at significantly lower temperatures (~ 900 ºC).For the nanocrystals doped with rare earth ions a valuable tool in the investigation of the morphology changes produced by various thermal treatments is the optical spectroscopy. Among the rare earth ions used to dope the nanocrystals, Eu 3+ plays a special role. Besides efficient red luminescence, the peculiarities of the emission transitions make the Eu 3+ ion an ideal probe, very sensitive to any changes of its neighbourhood.In this paper we use fluorescence spectroscopy in order to monitor the morphology changes induced by thermal treatments in the YAG:Eu nanocrystals synthesised by a nitrate-citrate sol-gel method.

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“…In chromate family, two groups are constituted, with small or medium Nv values and the largest Nv values as it is explicit from Fig. 8.Τhe Nv values calculated for various chro mates are small in comparison with those found in the C-type rare earth oxide series, for example, for which Nv is going from 1491 cm -1 (Gd2O3) to 2158 cm -1 (Sc2O3) [11]. In fact, the maximum splitting of the 7F1 level is 273 cm-1 for the unknown phase in KΕu(CrO4)2 synthesized by hydrothermal method (or 265 cm-1 for KLa(CrO4)2) instead of 461 cm-1 in Sc2O3.…”

Section: Crystal Field Simulationmentioning

confidence: 99%

Spectroscopic Study of Rare Earth Chromates: Relation to the Structure

Antić-Fidančev¹,

Lemaı̂tre-Blaise²,

Parada³

1996

Acta Phys. Pol. A

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The luminescence spectra of the trivalent europium ion embedded in various rare earth chromates were analyzed. The spectroscopic data in most of chromates are in agreement with the structural determination but for some others the discrepancy between two methods is underlined. Energy level schemes were deduced from the experimental emission spectra and the crystal field simulation has been performed. Tle maximum splitting of the 7 F 1 m a n i f o l d o f t h e E u 3 + ' i o n a s a f u n c t i o n o f Ν , t h e s o -c a l l e d c r y s t a l f i e l d strength parameter, is given. This allows us to classify the compounds according to their crystal field extent.

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The crystal field strength parameter and the maximum splitting of the 7F1 manifold of the Eu3+ ion in oxides

Cited by 97 publications

References 8 publications

Lanthanide‐Containing Light‐Emitting Organic–Inorganic Hybrids: A Bet on the Future

Lanthanide‐Containing Light‐Emitting Organic–Inorganic Hybrids: A Bet on the Future

Spectroscopy of Eu:YAG nanopowders

Spectroscopic Study of Rare Earth Chromates: Relation to the Structure

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