Energy transfer between terbium and europium ions in barium orthosilicate phosphors obtained from sol-gel route
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jlumin.2018.03.057 http://hdl.handle.net/11449/164130 |
Resumo: | The present paper reports on the energy transfer mechanism between Eu3+ and Tb3+ in barium orthosilicate obtained from the sol-gel route, when both activators concentration is varied. The synthetic methodology was adjusted to provide high crystalline and monophasic Ba2SiO4. In the emission spectra under 250 nm excitation, both Eu3+ (D-5(0)-> F-7(J)) and Tb3+ (D-5(3)-> F-7(J) and D-5(4)-> F-7(J)) transitions can be observed at low Eu3+ doping concentrations with an unexpected and intense blue emission from Tb3+. However, when the Eu3+ content is higher than that of the Tb3+, just the Eu3+ emission is noticed. Also, it is possible to tune the phosphor emission from red to pink by varying the Eu3+ and Tb3+ content. From the excitation spectra, we inferred that energy transfer (ET) from Tb3+ to Eu3+ occurs at any doping situation, nonetheless, the opposite process happens just when both activators amount is similar. An approach using the Tb3+ and Eu3+ lifetimes and the Eu3+ quantum efficiency confirms this observation, indicating that not only the matrix act as sensitizer to the Eu3+ ions, but also Tb3+ ions contribute by increasing the Eu3+ quantum efficiency in up to 20%. Finally, by using the Van Uitert theory, it was found for this system that the ET between the two rare-earth ions is dominated by the dipole-dipole mechanism. |
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Energy transfer between terbium and europium ions in barium orthosilicate phosphors obtained from sol-gel routeSilicateEuropiumTerbiumEnergy transferVan Uitert theorySpectroscopic probeThe present paper reports on the energy transfer mechanism between Eu3+ and Tb3+ in barium orthosilicate obtained from the sol-gel route, when both activators concentration is varied. The synthetic methodology was adjusted to provide high crystalline and monophasic Ba2SiO4. In the emission spectra under 250 nm excitation, both Eu3+ (D-5(0)-> F-7(J)) and Tb3+ (D-5(3)-> F-7(J) and D-5(4)-> F-7(J)) transitions can be observed at low Eu3+ doping concentrations with an unexpected and intense blue emission from Tb3+. However, when the Eu3+ content is higher than that of the Tb3+, just the Eu3+ emission is noticed. Also, it is possible to tune the phosphor emission from red to pink by varying the Eu3+ and Tb3+ content. From the excitation spectra, we inferred that energy transfer (ET) from Tb3+ to Eu3+ occurs at any doping situation, nonetheless, the opposite process happens just when both activators amount is similar. An approach using the Tb3+ and Eu3+ lifetimes and the Eu3+ quantum efficiency confirms this observation, indicating that not only the matrix act as sensitizer to the Eu3+ ions, but also Tb3+ ions contribute by increasing the Eu3+ quantum efficiency in up to 20%. Finally, by using the Van Uitert theory, it was found for this system that the ET between the two rare-earth ions is dominated by the dipole-dipole mechanism.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Sao Paulo State Univ Unesp, Sch Technol & Sci, R Roberto Simonsen 305, BR-19060900 Presidente Prudente, SP, BrazilSao Paulo State Univ Unesp, Inst Biosci Humanities & Exact Sci, BR-15054000 Sao Jose Do Rio Preto, SP, BrazilSao Paulo State Univ Unesp, Sch Technol & Sci, R Roberto Simonsen 305, BR-19060900 Presidente Prudente, SP, BrazilSao Paulo State Univ Unesp, Inst Biosci Humanities & Exact Sci, BR-15054000 Sao Jose Do Rio Preto, SP, BrazilCNPq: 307385/ 2015FAPESP: 2012/13876-9FAPESP: 2015/10394-1FAPESP: 2016/20421-9Elsevier B.V.Universidade Estadual Paulista (Unesp)Bispo-, Airton G. [UNESP]Lima, Sergio A. M. [UNESP]Pires, Ana. M. [UNESP]2018-11-26T17:49:14Z2018-11-26T17:49:14Z2018-07-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article372-378application/pdfhttp://dx.doi.org/10.1016/j.jlumin.2018.03.057Journal Of Luminescence. Amsterdam: Elsevier Science Bv, v. 199, p. 372-378, 2018.0022-2313http://hdl.handle.net/11449/16413010.1016/j.jlumin.2018.03.057WOS:000430713100055WOS000430713100055.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Luminescence0,694info:eu-repo/semantics/openAccess2024-06-18T18:18:24Zoai:repositorio.unesp.br:11449/164130Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:13:04.826866Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Energy transfer between terbium and europium ions in barium orthosilicate phosphors obtained from sol-gel route |
title |
Energy transfer between terbium and europium ions in barium orthosilicate phosphors obtained from sol-gel route |
spellingShingle |
Energy transfer between terbium and europium ions in barium orthosilicate phosphors obtained from sol-gel route Bispo-, Airton G. [UNESP] Silicate Europium Terbium Energy transfer Van Uitert theory Spectroscopic probe |
title_short |
Energy transfer between terbium and europium ions in barium orthosilicate phosphors obtained from sol-gel route |
title_full |
Energy transfer between terbium and europium ions in barium orthosilicate phosphors obtained from sol-gel route |
title_fullStr |
Energy transfer between terbium and europium ions in barium orthosilicate phosphors obtained from sol-gel route |
title_full_unstemmed |
Energy transfer between terbium and europium ions in barium orthosilicate phosphors obtained from sol-gel route |
title_sort |
Energy transfer between terbium and europium ions in barium orthosilicate phosphors obtained from sol-gel route |
author |
Bispo-, Airton G. [UNESP] |
author_facet |
Bispo-, Airton G. [UNESP] Lima, Sergio A. M. [UNESP] Pires, Ana. M. [UNESP] |
author_role |
author |
author2 |
Lima, Sergio A. M. [UNESP] Pires, Ana. M. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Bispo-, Airton G. [UNESP] Lima, Sergio A. M. [UNESP] Pires, Ana. M. [UNESP] |
dc.subject.por.fl_str_mv |
Silicate Europium Terbium Energy transfer Van Uitert theory Spectroscopic probe |
topic |
Silicate Europium Terbium Energy transfer Van Uitert theory Spectroscopic probe |
description |
The present paper reports on the energy transfer mechanism between Eu3+ and Tb3+ in barium orthosilicate obtained from the sol-gel route, when both activators concentration is varied. The synthetic methodology was adjusted to provide high crystalline and monophasic Ba2SiO4. In the emission spectra under 250 nm excitation, both Eu3+ (D-5(0)-> F-7(J)) and Tb3+ (D-5(3)-> F-7(J) and D-5(4)-> F-7(J)) transitions can be observed at low Eu3+ doping concentrations with an unexpected and intense blue emission from Tb3+. However, when the Eu3+ content is higher than that of the Tb3+, just the Eu3+ emission is noticed. Also, it is possible to tune the phosphor emission from red to pink by varying the Eu3+ and Tb3+ content. From the excitation spectra, we inferred that energy transfer (ET) from Tb3+ to Eu3+ occurs at any doping situation, nonetheless, the opposite process happens just when both activators amount is similar. An approach using the Tb3+ and Eu3+ lifetimes and the Eu3+ quantum efficiency confirms this observation, indicating that not only the matrix act as sensitizer to the Eu3+ ions, but also Tb3+ ions contribute by increasing the Eu3+ quantum efficiency in up to 20%. Finally, by using the Van Uitert theory, it was found for this system that the ET between the two rare-earth ions is dominated by the dipole-dipole mechanism. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-26T17:49:14Z 2018-11-26T17:49:14Z 2018-07-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.jlumin.2018.03.057 Journal Of Luminescence. Amsterdam: Elsevier Science Bv, v. 199, p. 372-378, 2018. 0022-2313 http://hdl.handle.net/11449/164130 10.1016/j.jlumin.2018.03.057 WOS:000430713100055 WOS000430713100055.pdf |
url |
http://dx.doi.org/10.1016/j.jlumin.2018.03.057 http://hdl.handle.net/11449/164130 |
identifier_str_mv |
Journal Of Luminescence. Amsterdam: Elsevier Science Bv, v. 199, p. 372-378, 2018. 0022-2313 10.1016/j.jlumin.2018.03.057 WOS:000430713100055 WOS000430713100055.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of Luminescence 0,694 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
372-378 application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129500115894272 |