Structural properties, Judd-Ofelt calculations, and near infrared to visible photon up-conversion in Er3+/Yb3+ doped BaTiO3 phosphors under excitation at 1500 nm

The structural and up-conversion properties of BaTiO3 phosphors doped with Er3+/Yb3+ have been studied. All phases were synthesized using the sol-gel process and characterized by X-ray powder diffraction (PXRD), Raman spectroscopy, optical absorption spectroscopy (Judd-Ofelt theory), and scanning el...

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Autores: Vega, M., Alemany i Cahner, Pere, Martin, I. R., Llanos, Jaime
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/121006
Acceso en línea:https://hdl.handle.net/2445/121006
Access Level:acceso abierto
Palabra clave:Espectroscòpia
Microscòpia electrònica d'escombratge
Spectrum analysis
Scanning electron microscopy
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spelling Structural properties, Judd-Ofelt calculations, and near infrared to visible photon up-conversion in Er3+/Yb3+ doped BaTiO3 phosphors under excitation at 1500 nmVega, M.Alemany i Cahner, PereMartin, I. R.Llanos, JaimeEspectroscòpiaMicroscòpia electrònica d'escombratgeSpectrum analysisScanning electron microscopyThe structural and up-conversion properties of BaTiO3 phosphors doped with Er3+/Yb3+ have been studied. All phases were synthesized using the sol-gel process and characterized by X-ray powder diffraction (PXRD), Raman spectroscopy, optical absorption spectroscopy (Judd-Ofelt theory), and scanning electron microscopy (SEM). Photoluminescence (PL) and time-resolved luminescence measures were employed to monitor the photon upconversion (UC) process in the synthetized phosphors. The results of PXRD show that all synthesized phases crystallize in a perovskite structure, where rare earth ions replace both Ba2+ and Ti4+ cations. Raman spectra confirm the coexistence of both cubic and tetragonal phases. Photon UC was studied under excitation at 1500 nm. The emission spectrum shows a strong emission at 975 nm (4I11/2 → 4I15/2) and a weak emission at 660 nm (4F9/2 → 4I15/2). To unravel the mechanism of photon UC, the dependence of the emission intensity on the pump power of the incident laser was also measured. Furthermore, the decay curves for the 975 nm emission upon excitation at 1500 and 800 nm were also recorded. These results of our study point towards a GSA/ESA type mechanism for photon UC in this material.Royal Society of Chemistry2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/121006Articles publicats en revistes (Ciència dels Materials i Química Física)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1039/c6ra28725eRSC Advances, 2017, vol. 7, p. 10529-10538https://doi.org/10.1039/c6ra28725ecc-by (c) Vega, M. et al., 2017http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1210062026-05-27T06:46:51Z
dc.title.none.fl_str_mv Structural properties, Judd-Ofelt calculations, and near infrared to visible photon up-conversion in Er3+/Yb3+ doped BaTiO3 phosphors under excitation at 1500 nm
title Structural properties, Judd-Ofelt calculations, and near infrared to visible photon up-conversion in Er3+/Yb3+ doped BaTiO3 phosphors under excitation at 1500 nm
spellingShingle Structural properties, Judd-Ofelt calculations, and near infrared to visible photon up-conversion in Er3+/Yb3+ doped BaTiO3 phosphors under excitation at 1500 nm
Vega, M.
Espectroscòpia
Microscòpia electrònica d'escombratge
Spectrum analysis
Scanning electron microscopy
title_short Structural properties, Judd-Ofelt calculations, and near infrared to visible photon up-conversion in Er3+/Yb3+ doped BaTiO3 phosphors under excitation at 1500 nm
title_full Structural properties, Judd-Ofelt calculations, and near infrared to visible photon up-conversion in Er3+/Yb3+ doped BaTiO3 phosphors under excitation at 1500 nm
title_fullStr Structural properties, Judd-Ofelt calculations, and near infrared to visible photon up-conversion in Er3+/Yb3+ doped BaTiO3 phosphors under excitation at 1500 nm
title_full_unstemmed Structural properties, Judd-Ofelt calculations, and near infrared to visible photon up-conversion in Er3+/Yb3+ doped BaTiO3 phosphors under excitation at 1500 nm
title_sort Structural properties, Judd-Ofelt calculations, and near infrared to visible photon up-conversion in Er3+/Yb3+ doped BaTiO3 phosphors under excitation at 1500 nm
dc.creator.none.fl_str_mv Vega, M.
Alemany i Cahner, Pere
Martin, I. R.
Llanos, Jaime
author Vega, M.
author_facet Vega, M.
Alemany i Cahner, Pere
Martin, I. R.
Llanos, Jaime
author_role author
author2 Alemany i Cahner, Pere
Martin, I. R.
Llanos, Jaime
author2_role author
author
author
dc.subject.none.fl_str_mv Espectroscòpia
Microscòpia electrònica d'escombratge
Spectrum analysis
Scanning electron microscopy
topic Espectroscòpia
Microscòpia electrònica d'escombratge
Spectrum analysis
Scanning electron microscopy
description The structural and up-conversion properties of BaTiO3 phosphors doped with Er3+/Yb3+ have been studied. All phases were synthesized using the sol-gel process and characterized by X-ray powder diffraction (PXRD), Raman spectroscopy, optical absorption spectroscopy (Judd-Ofelt theory), and scanning electron microscopy (SEM). Photoluminescence (PL) and time-resolved luminescence measures were employed to monitor the photon upconversion (UC) process in the synthetized phosphors. The results of PXRD show that all synthesized phases crystallize in a perovskite structure, where rare earth ions replace both Ba2+ and Ti4+ cations. Raman spectra confirm the coexistence of both cubic and tetragonal phases. Photon UC was studied under excitation at 1500 nm. The emission spectrum shows a strong emission at 975 nm (4I11/2 → 4I15/2) and a weak emission at 660 nm (4F9/2 → 4I15/2). To unravel the mechanism of photon UC, the dependence of the emission intensity on the pump power of the incident laser was also measured. Furthermore, the decay curves for the 975 nm emission upon excitation at 1500 and 800 nm were also recorded. These results of our study point towards a GSA/ESA type mechanism for photon UC in this material.
publishDate 2017
dc.date.none.fl_str_mv 2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/121006
url https://hdl.handle.net/2445/121006
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1039/c6ra28725e
RSC Advances, 2017, vol. 7, p. 10529-10538
https://doi.org/10.1039/c6ra28725e
dc.rights.none.fl_str_mv cc-by (c) Vega, M. et al., 2017
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Vega, M. et al., 2017
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Royal Society of Chemistry
publisher.none.fl_str_mv Royal Society of Chemistry
dc.source.none.fl_str_mv Articles publicats en revistes (Ciència dels Materials i Química Física)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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