Lanthanide-based dielectric nanoparticles for upconversion luminescence

Nowadays special attention has been given to materials capable of generating visible light by conversion of near infrared photons (upconversion) for save-energy technologies and reduction of photodegradation caused by UV high energy photons. Nanoparticles using optically active trivalent lanthanide...

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Detalles Bibliográficos
Autor: Barrera, E. W.
Tipo de recurso: tesis doctoral
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/67198
Acceso en línea:http://hdl.handle.net/10261/67198
Access Level:acceso abierto
Palabra clave:Nanoparticles
Upconversion
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spelling Lanthanide-based dielectric nanoparticles for upconversion luminescenceBarrera, E. W.NanoparticlesUpconversionNowadays special attention has been given to materials capable of generating visible light by conversion of near infrared photons (upconversion) for save-energy technologies and reduction of photodegradation caused by UV high energy photons. Nanoparticles using optically active trivalent lanthanide ions (Ln3+) have shown great potential for use as upconverting luminescent materials in bio-analysis applications, improvement of solar cells efficiency, fight of counterfeit in printed documents and back-lighting in liquid crystal displays. However materials with nanometer dimensions may affect the luminescence dynamics of the Ln3+ ion modifying the emission lifetime, quantum yield, and concentration quenching. This thesis discusses the synthesis and upconversion emission of Ln3+-doped nanostructures with Lu2O3 and KLu(WO4)2 as hosts because they possess high chemical stability and they offer favorable incorporation of Ln3+ ions and high absorption and emission cross sections. Three kinds of nanostructures are discussed: nanocrystals, nanorods and core-shell particles. Er3+, Ho3+ and Tm3+ are used as emitting ions and Yb3+ as sensitizer. Luminescence dynamics of these ions into the above nanostructures, and the generation of white light emission in KLu(WO4)2 nanocrystals are discussed.E.W. Barrera was supported by the Catalan Government through fellowships 2009FI-00148; 2010FI-B00834; 2011FI-B100097; 2012FI-B200136, and also by the European Community through the COST Action CM1006 European F-Element Network STSM-CM1006-050512-017263Peer reviewed201320132013info:eu-repo/semantics/doctoralThesishttp://purl.org/coar/resource_type/c_db06http://hdl.handle.net/10261/67198reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglésinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/671982026-05-22T06:33:51Z
dc.title.none.fl_str_mv Lanthanide-based dielectric nanoparticles for upconversion luminescence
title Lanthanide-based dielectric nanoparticles for upconversion luminescence
spellingShingle Lanthanide-based dielectric nanoparticles for upconversion luminescence
Barrera, E. W.
Nanoparticles
Upconversion
title_short Lanthanide-based dielectric nanoparticles for upconversion luminescence
title_full Lanthanide-based dielectric nanoparticles for upconversion luminescence
title_fullStr Lanthanide-based dielectric nanoparticles for upconversion luminescence
title_full_unstemmed Lanthanide-based dielectric nanoparticles for upconversion luminescence
title_sort Lanthanide-based dielectric nanoparticles for upconversion luminescence
dc.creator.none.fl_str_mv Barrera, E. W.
author Barrera, E. W.
author_facet Barrera, E. W.
author_role author
dc.subject.none.fl_str_mv Nanoparticles
Upconversion
topic Nanoparticles
Upconversion
description Nowadays special attention has been given to materials capable of generating visible light by conversion of near infrared photons (upconversion) for save-energy technologies and reduction of photodegradation caused by UV high energy photons. Nanoparticles using optically active trivalent lanthanide ions (Ln3+) have shown great potential for use as upconverting luminescent materials in bio-analysis applications, improvement of solar cells efficiency, fight of counterfeit in printed documents and back-lighting in liquid crystal displays. However materials with nanometer dimensions may affect the luminescence dynamics of the Ln3+ ion modifying the emission lifetime, quantum yield, and concentration quenching. This thesis discusses the synthesis and upconversion emission of Ln3+-doped nanostructures with Lu2O3 and KLu(WO4)2 as hosts because they possess high chemical stability and they offer favorable incorporation of Ln3+ ions and high absorption and emission cross sections. Three kinds of nanostructures are discussed: nanocrystals, nanorods and core-shell particles. Er3+, Ho3+ and Tm3+ are used as emitting ions and Yb3+ as sensitizer. Luminescence dynamics of these ions into the above nanostructures, and the generation of white light emission in KLu(WO4)2 nanocrystals are discussed.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013
2013
dc.type.none.fl_str_mv info:eu-repo/semantics/doctoralThesis
http://purl.org/coar/resource_type/c_db06
format doctoralThesis
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/67198
url http://hdl.handle.net/10261/67198
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
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