Europium-doped silica–titania thin films obtained by the sol–gel method

Zaręba-Grodź, Iwona; Pązik, Robert; Tylus, Włodzimierz; Mielcarek, W.; Hermanowicz, K.; Stręk, W.; Maruszewski, K.

doi:10.1016/j.optmat.2006.05.001

Cited by 24 publications

(12 citation statements)

References 18 publications

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“…1). Similar values has been reported for other authors [26][27][28]. The higher binding energy peak is related to the (3+) oxidation state and the lower binding energy peak corresponds to a (2+) oxidation state, in accordance with Ramos et al [26].…”

Section: Xps and Xrd Analysissupporting

confidence: 92%

Structure and optical characterization of photochemically prepared ZrO2 thin films doped with erbium and europium

Cabello

Lillo

Caro

et al. 2008

Journal of Non-Crystalline Solids

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Section: Xps and Xrd Analysissupporting

confidence: 92%

Structure and optical characterization of photochemically prepared ZrO2 thin films doped with erbium and europium

Cabello

Lillo

Caro

et al. 2008

Journal of Non-Crystalline Solids

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“…1 were taken from papers by Falcomer et al 13) and Ikeda et al, 14) respectively. A spectrum quite similar to Spectrum (1) (called broad band spectrum, hereafter) is found in many reports, 1,3,5,[10][11][12][16][17][18][19][20][21][22][23][24]27) while a spectrum similar to Spectrum (2) (called sharp line spectrum, hereafter) has been observed by Li et al 6) The broad band spectrum has its most intense band at 613 nm, while the sharp line spectrum has its at 618 nm. The difference between the sharp line spectrum and the broad band spectrum is not only in the band width but also in many features.…”

Section: Introductionmentioning

confidence: 63%

Spectroscopy Study on the Location and Distribution of Eu³⁺ Ions in TiO₂ Nanoparticles

Tsuboi

Setiawati

Kawano

2008

jjap

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Eu 3þ -and non-doped TiO 2 nanoparticles were synthesized by the sol-gel method at sintering temperatures of 500 or 900 C. The photoluminescence spectra of these nanoparticles have been investigated at various temperatures between 290 and 12 K. Two kinds of Eu 3þ photoluminescence spectra were observed. One spectrum consists of sharp lines; the other consists of broad bands. The former was obtained by indirect excitation into Eu 3þ with light of wavelengths shorter than 330 nm, while the latter was obtained by direct excitation into Eu 3þ with light of wavelengths longer than 380 nm which correspond to the Eu 3þ absorption bands. In the latter case, different spectra were obtained depending on the excitation wavelength even in the same absorption band. It is suggested that the sharp line spectrum is caused by Eu 3þ ions substituted for Ti 4þ but with some distortion around the Eu 3þ ions in the matrix of TiO 2 due to the large difference in ionic radius between the Ti 4þ and Eu 3þ ions, which are mainly present in the interior region of the nanoparticle. The broad band spectrum is caused by the disordered Eu 3þ ions with Eu-O-Ti bonds which are predominantly present in the near surface region.

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“…For this matrix, the reported lifetimes are between 230 and 776 μs and are temperature dependent. To sum up, because the ionic radius of Eu 3+ (1.07 Å) is larger than that of Si 4+ (0.4 Å), the amount of Eu 3+ in the matrix is restricted, and it can give place to the formation of clusters of the ion in the matrix that contributes to the cross relaxations [ 20 ].…”

Section: Resultsmentioning

confidence: 99%

Luminescent Properties of Eu3+-Doped Hybrid SiO2-PMMA Material for Photonic Applications

et al. 2018

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Hybrid organic-inorganic materials are of great interest for various applications. Here, we report on the synthesis and optical characterization of silica-PMMA samples with different Eu3+ molar concentrations. The optical properties of this material make it suitable for photonic applications. The samples were prepared using the sol-gel method, mixing tetraethyl orthosilicate (TEOS) as a silica glass precursor and methyl methacrylate (PMMA) as a polymer component. Europium nitrate pentahydrate was then added in six different molar concentrations (0.0, 0.1, 0.25, 0.5, 0.75, and 1%) to obtain as many different samples of the material. The absorption spectra were obtained applying the Kubelka–Munk formula to the diffuse reflectance spectra of the samples, all in the wavelength range between 240 and 2500 nm. The emission and excitation measurements were made in the visible range. Five bands could be identified in the emission spectra, related to electronic transitions of the ion Eu3+ (4D0→7Fi, i from 0 to 4). In the excitation spectra, the following bands were detected: 7F0→5G3 (379 nm), 7F0→5G2 (380 nm), 7F0→5L6 (392 nm), 7F0→5D3 (407 nm), 7F0→5D2 (462 nm), and 7F0→5D1 (530 nm). The emission decay times were measured for the different samples and showed an inverse dependence with the Eu3+ concentration.

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Europium-doped silica–titania thin films obtained by the sol–gel method

Cited by 24 publications

References 18 publications

Structure and optical characterization of photochemically prepared ZrO2 thin films doped with erbium and europium

Structure and optical characterization of photochemically prepared ZrO2 thin films doped with erbium and europium

Spectroscopy Study on the Location and Distribution of Eu³⁺ Ions in TiO₂ Nanoparticles

Luminescent Properties of Eu3+-Doped Hybrid SiO2-PMMA Material for Photonic Applications

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Europium-doped silica–titania thin films obtained by the sol–gel method

Cited by 24 publications

References 18 publications

Structure and optical characterization of photochemically prepared ZrO2 thin films doped with erbium and europium

Structure and optical characterization of photochemically prepared ZrO2 thin films doped with erbium and europium

Spectroscopy Study on the Location and Distribution of Eu3+ Ions in TiO2 Nanoparticles

Luminescent Properties of Eu3+-Doped Hybrid SiO2-PMMA Material for Photonic Applications

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Spectroscopy Study on the Location and Distribution of Eu³⁺ Ions in TiO₂ Nanoparticles