Increase of the blue upconversion emission in YAG:Tm3+ nanopowders by codoping with Yb3+ ions
Identifieur interne : 001398 ( Main/Exploration ); précédent : 001397; suivant : 001399Increase of the blue upconversion emission in YAG:Tm3+ nanopowders by codoping with Yb3+ ions
Auteurs : P. Haro-Gonzalez [Espagne] ; I. R. Martin [Espagne] ; S. Gonzalez-Perez [Espagne] ; M. Liu [République populaire de Chine] ; S. W. Wang [République populaire de Chine] ; N. Capuj [Espagne] ; F. Lahoz [Espagne]Source :
- Journal of luminescence [ 0022-2313 ] ; 2008.
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- Pascal (Inist)
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Abstract
The YAG nanopowders were prepared by a co-precipitation method using nitrate and ammonium hydrogen carbonate as raw materials. To obtain homogenous precipitate, reverse-strike (adding salt solutions to the precipitant solution) technique was adopted. Therefore, single (Tm3+) and codoped (Tm3+-Yb3+) YAG nanopowders with a size between 40-90 nm have been obtained. Blue upconversion emission at around 480 nm has been found in YAG: Tm3+ nanopowders under excitation to the 3H4 level of Tm3 + at around 800 nm. However, this upconversion emission in nanopowders codoped with Tm3+-Yb3+ ions is increased by a factor of about 10. The analysis of the temporal evolution of the involved levels and the dependence of the upconversion intensity on the pump power at 800 nm allowed to distinguish the upconversion mechanism. In YAG: Tm3+ nanopowders the upconversion mechanism is due to excited state absorption processes. However, in the codoped samples, Yb3+ ions acts as the sensitizers; in consequence, the blue upconversion is strongly increased.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Increase of the blue upconversion emission in YAG:Tm<sup>3+</sup> nanopowders by codoping with Yb<sup>3+</sup> ions</title><author><name sortKey="Haro Gonzalez, P" sort="Haro Gonzalez, P" uniqKey="Haro Gonzalez P" first="P." last="Haro-Gonzalez">P. Haro-Gonzalez</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Departamento de Física Fundamental y Experimental, Electrdnica y Sistemas, Universidad de La Laguna</s1><s2>38206 La Laguna, Tenerife</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Espagne</country><wicri:noRegion>38206 La Laguna, Tenerife</wicri:noRegion></affiliation></author><author><name sortKey="Martin, I R" sort="Martin, I R" uniqKey="Martin I" first="I. R." last="Martin">I. R. Martin</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Departamento de Física Fundamental y Experimental, Electrdnica y Sistemas, Universidad de La Laguna</s1><s2>38206 La Laguna, Tenerife</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Espagne</country><wicri:noRegion>38206 La Laguna, Tenerife</wicri:noRegion></affiliation></author><author><name sortKey="Gonzalez Perez, S" sort="Gonzalez Perez, S" uniqKey="Gonzalez Perez S" first="S." last="Gonzalez-Perez">S. Gonzalez-Perez</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Departamento de Física Fundamental y Experimental, Electrdnica y Sistemas, Universidad de La Laguna</s1><s2>38206 La Laguna, Tenerife</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Espagne</country><wicri:noRegion>38206 La Laguna, Tenerife</wicri:noRegion></affiliation></author><author><name sortKey="Liu, M" sort="Liu, M" uniqKey="Liu M" first="M." last="Liu">M. Liu</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Shanghai Institute of Ceramics, Chinese Academy of Sciences</s1><s2>Shanghai 200050</s2><s3>CHN</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>République populaire de Chine</country><wicri:noRegion>Shanghai 200050</wicri:noRegion></affiliation></author><author><name sortKey="Wang, S W" sort="Wang, S W" uniqKey="Wang S" first="S. W." last="Wang">S. W. 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Haro-Gonzalez</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Departamento de Física Fundamental y Experimental, Electrdnica y Sistemas, Universidad de La Laguna</s1><s2>38206 La Laguna, Tenerife</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Espagne</country><wicri:noRegion>38206 La Laguna, Tenerife</wicri:noRegion></affiliation></author><author><name sortKey="Martin, I R" sort="Martin, I R" uniqKey="Martin I" first="I. R." last="Martin">I. R. Martin</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Departamento de Física Fundamental y Experimental, Electrdnica y Sistemas, Universidad de La Laguna</s1><s2>38206 La Laguna, Tenerife</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Espagne</country><wicri:noRegion>38206 La Laguna, Tenerife</wicri:noRegion></affiliation></author><author><name sortKey="Gonzalez Perez, S" sort="Gonzalez Perez, S" uniqKey="Gonzalez Perez S" first="S." last="Gonzalez-Perez">S. Gonzalez-Perez</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Departamento de Física Fundamental y Experimental, Electrdnica y Sistemas, Universidad de La Laguna</s1><s2>38206 La Laguna, Tenerife</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Espagne</country><wicri:noRegion>38206 La Laguna, Tenerife</wicri:noRegion></affiliation></author><author><name sortKey="Liu, M" sort="Liu, M" uniqKey="Liu M" first="M." last="Liu">M. Liu</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Shanghai Institute of Ceramics, Chinese Academy of Sciences</s1><s2>Shanghai 200050</s2><s3>CHN</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>République populaire de Chine</country><wicri:noRegion>Shanghai 200050</wicri:noRegion></affiliation></author><author><name sortKey="Wang, S W" sort="Wang, S W" uniqKey="Wang S" first="S. W." last="Wang">S. W. Wang</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Shanghai Institute of Ceramics, Chinese Academy of Sciences</s1><s2>Shanghai 200050</s2><s3>CHN</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>République populaire de Chine</country><wicri:noRegion>Shanghai 200050</wicri:noRegion></affiliation></author><author><name sortKey="Capuj, N" sort="Capuj, N" uniqKey="Capuj N" first="N." last="Capuj">N. Capuj</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Departamento de Física Básica, Universidad de La Laguna</s1><s2>38206 La Laguna,Tenerife</s2><s3>ESP</s3><sZ>6 aut.</sZ></inist:fA14><country>Espagne</country><wicri:noRegion>38206 La Laguna,Tenerife</wicri:noRegion></affiliation></author><author><name sortKey="Lahoz, F" sort="Lahoz, F" uniqKey="Lahoz F" first="F." last="Lahoz">F. Lahoz</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Departamento de Física Fundamental y Experimental, Electrdnica y Sistemas, Universidad de La Laguna</s1><s2>38206 La Laguna, Tenerife</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Espagne</country><wicri:noRegion>38206 La Laguna, Tenerife</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Journal of luminescence</title><title level="j" type="abbreviated">J. lumin.</title><idno type="ISSN">0022-2313</idno><imprint><date when="2008">2008</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of luminescence</title><title level="j" type="abbreviated">J. lumin.</title><idno type="ISSN">0022-2313</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Codoping</term><term>Coprecipitation</term><term>Excited states</term><term>Frequency conversion</term><term>Impurity states</term><term>Nanocrystal</term><term>Nanopowder</term><term>Particle size</term><term>Photoluminescence</term><term>Thulium additions</term><term>Time dependence</term><term>Two-photon processes</term><term>YAG</term><term>Ytterbium additions</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Photoluminescence</term><term>Codopage</term><term>Coprécipitation</term><term>Dimension particule</term><term>Dépendance temps</term><term>Conversion fréquence</term><term>Etat excité</term><term>Addition ytterbium</term><term>Addition thulium</term><term>Etat impureté</term><term>Processus 2 photons</term><term>Grenat aluminium yttrium</term><term>Nanopoudre</term><term>Nanocristal</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The YAG nanopowders were prepared by a co-precipitation method using nitrate and ammonium hydrogen carbonate as raw materials. To obtain homogenous precipitate, reverse-strike (adding salt solutions to the precipitant solution) technique was adopted. Therefore, single (Tm<sup>3+</sup>) and codoped (Tm<sup>3+</sup>-Yb<sup>3+</sup>) YAG nanopowders with a size between 40-90 nm have been obtained. Blue upconversion emission at around 480 nm has been found in YAG: Tm<sup>3+</sup> nanopowders under excitation to the <sup>3</sup>H<sub>4</sub> level of Tm<sup>3</sup> <sup>+</sup> at around 800 nm. However, this upconversion emission in nanopowders codoped with Tm<sup>3+</sup>-Yb<sup>3+</sup> ions is increased by a factor of about 10. The analysis of the temporal evolution of the involved levels and the dependence of the upconversion intensity on the pump power at 800 nm allowed to distinguish the upconversion mechanism. In YAG: Tm<sup>3+</sup> nanopowders the upconversion mechanism is due to excited state absorption processes. However, in the codoped samples, Yb<sup>3+</sup> ions acts as the sensitizers; in consequence, the blue upconversion is strongly increased.</div></front></TEI><affiliations><list><country><li>Espagne</li><li>République populaire de Chine</li></country></list><tree><country name="Espagne"><noRegion><name sortKey="Haro Gonzalez, P" sort="Haro Gonzalez, P" uniqKey="Haro Gonzalez P" first="P." last="Haro-Gonzalez">P. Haro-Gonzalez</name></noRegion><name sortKey="Capuj, N" sort="Capuj, N" uniqKey="Capuj N" first="N." last="Capuj">N. Capuj</name><name sortKey="Gonzalez Perez, S" sort="Gonzalez Perez, S" uniqKey="Gonzalez Perez S" first="S." last="Gonzalez-Perez">S. Gonzalez-Perez</name><name sortKey="Lahoz, F" sort="Lahoz, F" uniqKey="Lahoz F" first="F." last="Lahoz">F. Lahoz</name><name sortKey="Martin, I R" sort="Martin, I R" uniqKey="Martin I" first="I. R." last="Martin">I. R. Martin</name></country><country name="République populaire de Chine"><noRegion><name sortKey="Liu, M" sort="Liu, M" uniqKey="Liu M" first="M." last="Liu">M. Liu</name></noRegion><name sortKey="Wang, S W" sort="Wang, S W" uniqKey="Wang S" first="S. W." last="Wang">S. W. Wang</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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