Elaboration and scintillation properties of Eu3+-doped Gd2O3 and Lu2O3 sol–gel films

García-Murillo, A.; Luyer, Cécile Le; Dujardin, Christophe; Martin, Thierry; Garapon, C.; Pédrini, C.; Mugnier, J.

doi:10.1016/s0168-9002(02)00699-x

Cited by 84 publications

(33 citation statements)

References 5 publications

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“…It has been developed for various applications such as in magnetic, 1,2 catalyst, 3 phosphor, 4 nuclear 5 and optical 6 fields. High-quality sol-gel thin films exhibiting waveguiding quality have been elaborated in our laboratory.…”

Section: Introductionmentioning

confidence: 99%

Waveguide Raman spectroscopy of sol–gel Gd₂O₃ thin films

Luyer

García-Murillo

Bernstein

et al. 2003

J Raman Spectroscopy

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Gadolinium oxide films, prepared by the sol-gel process, present waveguiding properties. Their structures were studied by waveguide Raman spectroscopy (WRS) and confirmed using transmission electron microscopy (TEM). The structural evolution of the layers with annealing temperatures from 650 up to 900 • C was investigated. The WRS results and TEM observations were correlated and revealed that crystallization started at 650 • C into the cubic phase. The mean diameter of the crystallites dispersed in the amorphous phase is around 5 nm at this temperature. The film is totally crystallized into the cubic phase at 700 • C. The monoclinic phase simultaneously appears at 800 • C and both phases still co-exist after heat treatment at 900 • C. The films present a heterogeneous structure at 900 • C with grain sizes varying from 5 up to 50 nm and as consequence their waveguiding properties strongly decrease.

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Section: Introductionmentioning

confidence: 99%

Waveguide Raman spectroscopy of sol–gel Gd₂O₃ thin films

Luyer

García-Murillo

Bernstein

et al. 2003

J Raman Spectroscopy

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“…It is known that the europium ion emits in the red region when acting with its valence 3+. 29) This can be generated under the influence of ultraviolet light, visible, X-ray or an electron beam. Figure 6 also shows that the luminescence intensity of the powders of Lu 2 O 3 :Eu 3+ (5% mol)@SiO 2 depends on the particle size and content molar of SiO 2 .…”

Section: Photoluminescence Propertiesmentioning

confidence: 99%

Synthesis of Lu2O3:Eu3+ Luminescent Ceramic Powder Embedded in SiO2 Matrix

Jota

Hernández²,

Murillo

et al. 2014

Mater. Trans.

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In the present work, the effect of SiO 2 was analyzed in different molar ratios (Lu : Si = 4 : 1, 6 : 1, 8 : 1, 10 : 1 and 1 : 0), in order to prepare SiO 2 embedded Lu 2 O 3 :Eu 3+ sol-gel luminescent powders, from a modified PVP-containing solution. The crystalized SiO 2 embedded Lu 2 O 3 :Eu 3+ powders were characterized by Fourier transform infrared spectroscopy revealing the presence of high intensity bands associated with siloxanes groups at 700°C, which could indicate a cross-linked Si-O groups to Lu 2 O 3 :Eu 3+ . X-ray diffraction results showed that cubic phase was present in the powder heat treated at 500°C and remained up to 700°C. The powders SiO 2 embedded Lu 2 O 3 :Eu 3+ powders in molar ratio Lu:Si 4 : 1 and 10 : 1 masked the crystallinity of glass ceramic. The SiO 2 effect on the morphology of the glass ceramic systems was monitored by scanning electron microscopy observations, from these results homogenous particles were obtained for Lu:Si 6 : 1 and 8 : 1 systems. Photoluminescence studies showed that adding silica to the ceramic systems increases the typical emission to around em = 611 nm.

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“…For example, the selection rules for intra-4f transitions are somewhat relaxed by placing the ion within a solid host, and the otherwise forbidden nature of these transitions now permit slow radiative decay. These properties make trivalent RE ions such as europium [1,2] and erbium [3,4] interesting for applications including emissive displays, laser gain media, scintillation detectors [5], and biosensing [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…2, where some peaks are broad and have unresolved structure, we have deconvoluted the spectrum into its constituent components in order to obtain the data appearing in the tables. Some of these bands also represent emission from 5 Fig. 2.…”

Section: Introductionmentioning

confidence: 99%

Spectra and energy levels of Eu3+ in cubic phase Gd2O3

Smith

Gruber

Wellenius

et al. 2010

phys. stat. sol. (b)

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In pulsed laser deposition of the sesquioxide semiconductor Gd 2 O 3 , adjusting the chamber oxygen pressure controls the crystalline structure of the host. This technique was used to deposit thin films of nominally 1.6% by weight europiumdoped, cubic phase Gd 2 O 3 using 50 mTorr of oxygen. Structural measurements using high-resolution transmission electron microscopy and selected area electron diffraction confirm the films were polycrystalline, cubic phase Eu:Gd 2 O 3 . The spectroscopic assignment of emission lines to specific radiative transitions within the trivalent Eu ion is confirmed by theoretical analysis of the appropriate crystal field Hamiltonian.

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Elaboration and scintillation properties of Eu3+-doped Gd2O3 and Lu2O3 sol–gel films

Cited by 84 publications

References 5 publications

Waveguide Raman spectroscopy of sol–gel Gd₂O₃ thin films

Waveguide Raman spectroscopy of sol–gel Gd₂O₃ thin films

Synthesis of Lu<sub>2</sub>O<sub>3</sub>:Eu<sup>3+</sup> Luminescent Ceramic Powder Embedded in SiO<sub>2</sub> Matrix

Spectra and energy levels of Eu3+ in cubic phase Gd2O3

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Elaboration and scintillation properties of Eu3+-doped Gd2O3 and Lu2O3 sol–gel films

Cited by 84 publications

References 5 publications

Waveguide Raman spectroscopy of sol–gel Gd2O3 thin films

Waveguide Raman spectroscopy of sol–gel Gd2O3 thin films

Synthesis of Lu<sub>2</sub>O<sub>3</sub>:Eu<sup>3+</sup> Luminescent Ceramic Powder Embedded in SiO<sub>2</sub> Matrix

Spectra and energy levels of Eu3+ in cubic phase Gd2O3

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Waveguide Raman spectroscopy of sol–gel Gd₂O₃ thin films

Waveguide Raman spectroscopy of sol–gel Gd₂O₃ thin films