Effects of rehydration on Tb3+ spectroscopy in sol–gel glasses

Boye, D.M.; Silversmith, A. J.; Nguyen, Thanh Thi; Hoffman, K.R.

doi:10.1016/j.jnoncrysol.2007.03.021

Cited by 19 publications

(20 citation statements)

References 9 publications

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“…Samples were prepared using the sol-gel method as described elsewhere [4]. Densification and formation of the glass were accomplished by annealing in air at 900 1C.…”

Section: Methodsmentioning

confidence: 99%

Rare-earth ion distribution in sol–gel glasses co-doped with Al3+

Silversmith

Nguyen

Sullivan

et al. 2008

Journal of Luminescence

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“…Samples were prepared using the sol-gel method as described elsewhere [4]. Densification and formation of the glass were accomplished by annealing in air at 900 1C.…”

Section: Methodsmentioning

confidence: 99%

Rare-earth ion distribution in sol–gel glasses co-doped with Al3+

Silversmith

Nguyen

Sullivan

et al. 2008

Journal of Luminescence

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“…Previously aluminium [17] has been shown to be more efficient in enhancing luminescence of dopants in materials such as Tb 3+ [18] and thus became the standard codopant used by different research groups [19] in the phosphor field. Now, we see other elements such as Eu and Mg showing similar properties.…”

Section: Resultsmentioning

confidence: 99%

Luminescence Properties of Eu- and Mg-Codoped Sol-Gel SiO2 Glasses

Onani

Mushonga

Koao

et al. 2012

ISRN Nanotechnology

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A series of SiO 2 nanostructures codoped with Eu 3+ ; Mg 2+ ions were obtained by a sol-gel method. The gels synthesized by the hydrolysis of Si(OC 2 H 5 ) 4 , Eu(NO 3 ) 3 ·6H 2 O, and Mg(NO 3 ) 2 were heated in air at 600• C for 2 hours. Firstly, the total amount of Eu 3+ ions was varied from 0 to 2.0 mol% to investigate the effect of self-damping, while in the second case, the Eu 3+ ions were kept constant in the experiment at 0.5 mol% total doping and Mg 2+ ions varied. The samples were characterized by X-ray diffraction, TEM, EDS, and UV lamp-excited luminescence spectroscopy. The Eu 3+ ions were homogeneously dispersed in the silica and interacting with the small (1-5 nm) amorphous silica matrix. Strong red emissions located at 614 nm and 590 nm for doped and codoped SiO 2 were observed from the UV light excitation at room temperature. The composition of around 1.25 mol% Eu 3+ gave highest emission intensity. SiO 2 ; Mg 2+ ions portray strongly enhanced emissions due to energy transfer from Mg 2+ to Eu 3+ , which is due to radiative recombination. An increase in luminescence intensity was observed as the Mg 2+ -to-Eu 3+ ratio increased for the range investigated. The results show Eu 3+ ion is located inside or at the surface of disordered SiO 2 nanoparticles.

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“…Sol-gel optical materials have diverse potential applications in phosphor, laser, and amplifier technologies [1], but low fluorescence yields have hindered their practical use in many cases. Energy transfer (ET) among rare earths and ET to water-related species [2] are primary causes of fluorescence quenching. This paper will focus on ET among rare earth ions, specifically, the concentrationdependent cross relaxation (CR) mechanism of Tb 3+ [3].…”

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confidence: 99%

“…Gelation and densification were accomplished as in Ref. [2]. Samples were single monoliths with good transparency and had an average density of $1.5 g cm À3 compared with 2.2 g cm À3 of vitreous silica.…”

mentioning

confidence: 99%