Luminescent properties of Eu3+–Tb3+-doped SiO2–SnO2-based nano-glass–ceramics prepared by sol–gel method

del-Castillo, J.; Yanes, A.C.; Velázquez, J. J.; Méndez‐Ramos, J.; Rodrı́guez, V.D.

doi:10.1016/j.jallcom.2008.06.048

Cited by 25 publications

(11 citation statements)

References 16 publications

(29 reference statements)

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“…The peaks appearing at 1000-1250 cm −1 and the peak at approximately 805 cm −1 , can be respectively attributed to asymmetric and symmetric Si-O stretching vibration. The band at 968 cm −1 can be assigned to silanol (Si-OH) stretching vibration of surface groups [15,16].…”

Section: Ft-ir Studiesmentioning

confidence: 99%

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Synthesis and characterization of spherical Tb-MCM-41

Pires¹,

Queiroz²,

Souza³

et al. 2010

Journal of Alloys and Compounds

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Section: Ft-ir Studiesmentioning

confidence: 99%

“…For instance, researchers have found that the resulting materials can be employed as green phosphors for trichromatic fluorescence lamps, TV monitors, and optical integrated devices [15]. Terbium doped nanosized mesoporous MCM-41 was successfully obtained by Yin and Zhang [16].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of spherical Tb-MCM-41

Pires¹,

Queiroz²,

Souza³

et al. 2010

Journal of Alloys and Compounds

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“…PL excitation spectra revealed an ET process between Eu 3+ and SnO 2 NCs, thus indicating the incorporation of Eu 3+ in the crystal phase and making possible its emission upon SnO 2 excitation. Other authors studied (100 − x)SiO 2 -xSnO 2 (x = 1–10 mol %) GCs doped with Eu 3+ and Eu 3+ -Tb 3+ following Nogami’s synthesis [91,92,93]. By increasing the SnO 2 content up to 10 mol % (NCs size ~5 nm), a low quantum confinement effect was observed.…”

Section: Introductionmentioning

confidence: 99%

Transparent Glass-Ceramics Produced by Sol-Gel: A Suitable Alternative for Photonic Materials

et al. 2018

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Transparent glass-ceramics have shown interesting optical properties for several photonic applications. In particular, compositions based on oxide glass matrices with fluoride crystals embedded inside, known as oxyfluoride glass-ceramics, have gained increasing interest in the last few decades. Melt-quenching is still the most used method to prepare these materials but sol-gel has been indicated as a suitable alternative. Many papers have been published since the end of the 1990s, when these materials were prepared by sol-gel for the first time, thus a review of the achievements obtained so far is necessary. In the first part of this paper, a review of transparent sol-gel glass-ceramics is made focusing mainly on oxyfluoride compositions. Many interesting optical results have been obtained but very little innovation of synthesis and processing is found with respect to pioneering papers published 20 years ago. In the second part we describe the improvements in synthesis and processing obtained by the authors during the last five years. The main achievements are the preparation of oxyfluoride glass-ceramics with a much higher fluoride crystal fraction, at least double that reported up to now, and the first synthesis of NaGdF4 glass-ceramics. Moreover, a new SiO2 precursor was introduced in the synthesis, allowing for a reduction in the treatment temperature and favoring hydroxyl group removal. Interesting optical properties demonstrated the incorporation of dopant ions in the fluoride crystals, thus obtaining crystal-like spectra along with higher efficiencies with respect to xerogels, and hence demonstrating that these materials are a suitable alternative for photonic applications.

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“…In our previous works [5,6], efforts were made to synthesize the nano-crystalline lithium-mica glass-ceramics applying the sol-gel method because of a variety of advantages such as its high purity, lower sintering temperature, high degree of homogeneity, and environment-friendliness [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%