Up-conversion in nanostructured Yb3+-Tm3+co-doped sol-gel derived SiO2-LaF3 transparent glass-ceramics
Identifieur interne : 001318 ( Main/Exploration ); précédent : 001317; suivant : 001319Up-conversion in nanostructured Yb3+-Tm3+co-doped sol-gel derived SiO2-LaF3 transparent glass-ceramics
Auteurs : J. Mendez-Ramos [Espagne] ; J. J. Velazquez [Espagne] ; A. C. Yanes [Espagne] ; J. Del-Castillo [Espagne] ; V. D. Rodriguez [Espagne]Source :
- Physica status solidi. A, Applications and materials science : (Print) [ 1862-6300 ] ; 2008.
Descripteurs français
- Pascal (Inist)
- Conversion fréquence, Photoluminescence, Procédé sol gel, Addition thulium, Traitement thermique, Addition ytterbium, Ségrégation, Diffraction RX, Codopage, Précipitation, Nanostructure, Silice, Fluorure de lanthane, Vitrocéramique, Verre, Nanocristal, Système binaire, Composé minéral, Système SiO2 LaF3.
- Wicri :
- topic : Verre, Composé minéral.
English descriptors
- KwdEn :
Abstract
Nanostructured transparent glass-ceramics with composition of 95SiO2-5LaF3 doped with 0.1 mol% of Tm3+ or co-doped with 0.1 mol% of Tm3+ and 0.3 mol% of Yb3+ were synthesized by thermal treatment of precursor sol-gel denved glasses. A comparative luminescence analysis in terms of different temperatures of thermal treatments has been carried out. Segregation of LaF3 nanocrystals in matrix was confirmed by X-ray diffraction. Blue and red efficient up-conversion emissions were observed under 980 nm excitation at room temperature. These resuits indicate partition of a significant fraction of co-dopants into the precipitated LaF3 nanocrystals. The mechanisms involved in the up-conversion emissions have been analyzed and can be ascribed to processes with two, three and four photons.
Affiliations:
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Le document en format XML
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-Tm<sup>3+</sup>
co-doped sol-gel derived SiO<sub>2</sub>
-LaF<sub>3</sub>
transparent glass-ceramics</title>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Up-conversion in nanostructured Yb<sup>3+</sup>
-Tm<sup>3+</sup>
co-doped sol-gel derived SiO<sub>2</sub>
-LaF<sub>3</sub>
transparent glass-ceramics</title>
<author><name sortKey="Mendez Ramos, J" sort="Mendez Ramos, J" uniqKey="Mendez Ramos J" first="J." last="Mendez-Ramos">J. Mendez-Ramos</name>
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<country>Espagne</country>
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<author><name sortKey="Velazquez, J J" sort="Velazquez, J J" uniqKey="Velazquez J" first="J. J." last="Velazquez">J. J. Velazquez</name>
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</author>
<author><name sortKey="Yanes, A C" sort="Yanes, A C" uniqKey="Yanes A" first="A. C." last="Yanes">A. C. Yanes</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Departamento de Física Bâsica, Universidad de La Laguna</s1>
<s2>38206 La Laguna, Tenerife</s2>
<s3>ESP</s3>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
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<country>Espagne</country>
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<author><name sortKey="Del Castillo, J" sort="Del Castillo, J" uniqKey="Del Castillo J" first="J." last="Del-Castillo">J. Del-Castillo</name>
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<series><title level="j" type="main">Physica status solidi. A, Applications and materials science : (Print)</title>
<title level="j" type="abbreviated">Phys. status solidi, A Appl. mater. sci. : (Print)</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Binary systems</term>
<term>Codoping</term>
<term>Frequency conversion</term>
<term>Glass</term>
<term>Glass ceramics</term>
<term>Heat treatments</term>
<term>Inorganic compounds</term>
<term>Lanthanum fluoride</term>
<term>Nanocrystal</term>
<term>Nanostructures</term>
<term>Photoluminescence</term>
<term>Precipitation</term>
<term>Segregation</term>
<term>Silica</term>
<term>Sol-gel process</term>
<term>Thulium additions</term>
<term>XRD</term>
<term>Ytterbium additions</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Conversion fréquence</term>
<term>Photoluminescence</term>
<term>Procédé sol gel</term>
<term>Addition thulium</term>
<term>Traitement thermique</term>
<term>Addition ytterbium</term>
<term>Ségrégation</term>
<term>Diffraction RX</term>
<term>Codopage</term>
<term>Précipitation</term>
<term>Nanostructure</term>
<term>Silice</term>
<term>Fluorure de lanthane</term>
<term>Vitrocéramique</term>
<term>Verre</term>
<term>Nanocristal</term>
<term>Système binaire</term>
<term>Composé minéral</term>
<term>Système SiO2 LaF3</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Verre</term>
<term>Composé minéral</term>
</keywords>
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<front><div type="abstract" xml:lang="en">Nanostructured transparent glass-ceramics with composition of 95SiO<sub>2</sub>
-5LaF<sub>3</sub>
doped with 0.1 mol% of Tm<sup>3+</sup>
or co-doped with 0.1 mol% of Tm<sup>3+</sup>
and 0.3 mol% of Yb<sup>3+</sup>
were synthesized by thermal treatment of precursor sol-gel denved glasses. A comparative luminescence analysis in terms of different temperatures of thermal treatments has been carried out. Segregation of LaF<sub>3</sub>
nanocrystals in matrix was confirmed by X-ray diffraction. Blue and red efficient up-conversion emissions were observed under 980 nm excitation at room temperature. These resuits indicate partition of a significant fraction of co-dopants into the precipitated LaF<sub>3</sub>
nanocrystals. The mechanisms involved in the up-conversion emissions have been analyzed and can be ascribed to processes with two, three and four photons.</div>
</front>
</TEI>
<affiliations><list><country><li>Espagne</li>
</country>
</list>
<tree><country name="Espagne"><noRegion><name sortKey="Mendez Ramos, J" sort="Mendez Ramos, J" uniqKey="Mendez Ramos J" first="J." last="Mendez-Ramos">J. Mendez-Ramos</name>
</noRegion>
<name sortKey="Del Castillo, J" sort="Del Castillo, J" uniqKey="Del Castillo J" first="J." last="Del-Castillo">J. Del-Castillo</name>
<name sortKey="Rodriguez, V D" sort="Rodriguez, V D" uniqKey="Rodriguez V" first="V. D." last="Rodriguez">V. D. Rodriguez</name>
<name sortKey="Velazquez, J J" sort="Velazquez, J J" uniqKey="Velazquez J" first="J. J." last="Velazquez">J. J. Velazquez</name>
<name sortKey="Yanes, A C" sort="Yanes, A C" uniqKey="Yanes A" first="A. C." last="Yanes">A. C. Yanes</name>
</country>
</tree>
</affiliations>
</record>
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