Towards a white-emitting phosphor Ca10V6O25 based material
Autor(a) principal: | |
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Data de Publicação: | 2020 |
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.2019.116990 http://hdl.handle.net/11449/221417 |
Resumo: | To achieve a stable material capable of white-light emission, we fabricated Ca10V6O25 by both co-precipitation (CP) and microwave-assisted hydrothermal (MAH) methods at different temperatures. The effects of structural disorder at a short-range (Raman spectra), medium-range (UV–vis spectra), and long-range (X-ray diffraction) on the material structure and its effect on optical properties were investigated. Both CP and the MAH methods were efficient for obtaining pure Ca10V6O25 material with different morphologies. Significant changes in morphology and degree of structural order and disorder were found to affect the photoluminescence (PL) properties. All samples exhibited a broadband PL spectrum, characteristic associated to charge transfer processes of the [VO4]3- group, as well as transitions that occurred in the energy levels located within the band gap. The samples obtained by the MAH method at temperatures of 100 °C and 120 °C exhibited a lower structural disorder (at long- and short-ranges), the CIE chromaticity coordinates were located in the white region, MAH100 (x = 0.311 and y = 0.348) and MAH120 (x = 0.350 and y = 0.368). Furthermore, we conducted a detailed study of temperature dependence of PL spectra. All samples displayed decreased luminescence intensity as temperatures increased and low values of activation energy (approximately 2 meV). Finally, the as-synthetized Ca10V6O25 material has interesting properties for possible applications as a white-emitting phosphor under ultraviolet excitation. |
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Towards a white-emitting phosphor Ca10V6O25 based materialCalcium vanadate Ca10V6O25Optical propertiesThermal quenchingWhite emissionTo achieve a stable material capable of white-light emission, we fabricated Ca10V6O25 by both co-precipitation (CP) and microwave-assisted hydrothermal (MAH) methods at different temperatures. The effects of structural disorder at a short-range (Raman spectra), medium-range (UV–vis spectra), and long-range (X-ray diffraction) on the material structure and its effect on optical properties were investigated. Both CP and the MAH methods were efficient for obtaining pure Ca10V6O25 material with different morphologies. Significant changes in morphology and degree of structural order and disorder were found to affect the photoluminescence (PL) properties. All samples exhibited a broadband PL spectrum, characteristic associated to charge transfer processes of the [VO4]3- group, as well as transitions that occurred in the energy levels located within the band gap. The samples obtained by the MAH method at temperatures of 100 °C and 120 °C exhibited a lower structural disorder (at long- and short-ranges), the CIE chromaticity coordinates were located in the white region, MAH100 (x = 0.311 and y = 0.348) and MAH120 (x = 0.350 and y = 0.368). Furthermore, we conducted a detailed study of temperature dependence of PL spectra. All samples displayed decreased luminescence intensity as temperatures increased and low values of activation energy (approximately 2 meV). Finally, the as-synthetized Ca10V6O25 material has interesting properties for possible applications as a white-emitting phosphor under ultraviolet excitation.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Generalitat ValencianaMinisterio de Economía y CompetitividadUniversitat Jaume ILaboratório Nacional de Luz SíncrotronCDMF-UFSCar Universidade Federal de São Carlos, P.O. Box 676Departamento de Física Universidade Federal de São Carlos Rod. Washington Luiz, km 235, CP 676High Fields Magnetic Laboratory Radboud University, Toernooiveld 7Departamento de Química Física i Analítica Universitat Jaume IGrupo de Modelagem e Simulações Moleculares Faculdade de Ciências Universidade Estadual de São PauloGrupo de Modelagem e Simulações Moleculares Faculdade de Ciências Universidade Estadual de São PauloCAPES: 001CNPq: 166281/2017–4FAPESP: 2018/01808–5Generalitat Valenciana: ACOMP/2015/1202Ministerio de Economía y Competitividad: CTQ2015-65207-PGeneralitat Valenciana: PrometeoII/2014/022Universitat Jaume I: UJI-B2016-25Laboratório Nacional de Luz Síncrotron: XAFS2-20180338Universidade Federal de São Carlos (UFSCar)Radboud UniversityUniversitat Jaume IUniversidade Estadual Paulista (UNESP)Teixeira, Mayara MondegoGobato, Yara GalvãoGracia, Lourdesda Silva, Luís FernandoAvansi, WaldirAssis, Marcelode Oliveira, Regiane Cristina [UNESP]Prando, Gabriela AugustaAndrés, JuanLongo, Elson2022-04-28T19:28:25Z2022-04-28T19:28:25Z2020-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.jlumin.2019.116990Journal of Luminescence, v. 220.0022-2313http://hdl.handle.net/11449/22141710.1016/j.jlumin.2019.1169902-s2.0-85077198683Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Luminescenceinfo:eu-repo/semantics/openAccess2022-04-28T19:28:25Zoai:repositorio.unesp.br:11449/221417Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-28T19:28:25Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Towards a white-emitting phosphor Ca10V6O25 based material |
title |
Towards a white-emitting phosphor Ca10V6O25 based material |
spellingShingle |
Towards a white-emitting phosphor Ca10V6O25 based material Teixeira, Mayara Mondego Calcium vanadate Ca10V6O25 Optical properties Thermal quenching White emission |
title_short |
Towards a white-emitting phosphor Ca10V6O25 based material |
title_full |
Towards a white-emitting phosphor Ca10V6O25 based material |
title_fullStr |
Towards a white-emitting phosphor Ca10V6O25 based material |
title_full_unstemmed |
Towards a white-emitting phosphor Ca10V6O25 based material |
title_sort |
Towards a white-emitting phosphor Ca10V6O25 based material |
author |
Teixeira, Mayara Mondego |
author_facet |
Teixeira, Mayara Mondego Gobato, Yara Galvão Gracia, Lourdes da Silva, Luís Fernando Avansi, Waldir Assis, Marcelo de Oliveira, Regiane Cristina [UNESP] Prando, Gabriela Augusta Andrés, Juan Longo, Elson |
author_role |
author |
author2 |
Gobato, Yara Galvão Gracia, Lourdes da Silva, Luís Fernando Avansi, Waldir Assis, Marcelo de Oliveira, Regiane Cristina [UNESP] Prando, Gabriela Augusta Andrés, Juan Longo, Elson |
author2_role |
author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de São Carlos (UFSCar) Radboud University Universitat Jaume I Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Teixeira, Mayara Mondego Gobato, Yara Galvão Gracia, Lourdes da Silva, Luís Fernando Avansi, Waldir Assis, Marcelo de Oliveira, Regiane Cristina [UNESP] Prando, Gabriela Augusta Andrés, Juan Longo, Elson |
dc.subject.por.fl_str_mv |
Calcium vanadate Ca10V6O25 Optical properties Thermal quenching White emission |
topic |
Calcium vanadate Ca10V6O25 Optical properties Thermal quenching White emission |
description |
To achieve a stable material capable of white-light emission, we fabricated Ca10V6O25 by both co-precipitation (CP) and microwave-assisted hydrothermal (MAH) methods at different temperatures. The effects of structural disorder at a short-range (Raman spectra), medium-range (UV–vis spectra), and long-range (X-ray diffraction) on the material structure and its effect on optical properties were investigated. Both CP and the MAH methods were efficient for obtaining pure Ca10V6O25 material with different morphologies. Significant changes in morphology and degree of structural order and disorder were found to affect the photoluminescence (PL) properties. All samples exhibited a broadband PL spectrum, characteristic associated to charge transfer processes of the [VO4]3- group, as well as transitions that occurred in the energy levels located within the band gap. The samples obtained by the MAH method at temperatures of 100 °C and 120 °C exhibited a lower structural disorder (at long- and short-ranges), the CIE chromaticity coordinates were located in the white region, MAH100 (x = 0.311 and y = 0.348) and MAH120 (x = 0.350 and y = 0.368). Furthermore, we conducted a detailed study of temperature dependence of PL spectra. All samples displayed decreased luminescence intensity as temperatures increased and low values of activation energy (approximately 2 meV). Finally, the as-synthetized Ca10V6O25 material has interesting properties for possible applications as a white-emitting phosphor under ultraviolet excitation. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-04-01 2022-04-28T19:28:25Z 2022-04-28T19:28:25Z |
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.2019.116990 Journal of Luminescence, v. 220. 0022-2313 http://hdl.handle.net/11449/221417 10.1016/j.jlumin.2019.116990 2-s2.0-85077198683 |
url |
http://dx.doi.org/10.1016/j.jlumin.2019.116990 http://hdl.handle.net/11449/221417 |
identifier_str_mv |
Journal of Luminescence, v. 220. 0022-2313 10.1016/j.jlumin.2019.116990 2-s2.0-85077198683 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Luminescence |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus 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_ |
1797790213597036544 |