Tunable photoluminescence of CaCu3Ti4O12 based ceramics modified with tungsten

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Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade Federal de Sergipe (UFS)-
Autor(es): dc.contributorBrazilian Ctr Res Energy & Mat CNPEM-
Autor(es): dc.creatorMoreno, H. [UNESP]-
Autor(es): dc.creatorCortes, J. A. [UNESP]-
Autor(es): dc.creatorPraxedes, F. M. [UNESP]-
Autor(es): dc.creatorFreitas, S. M.-
Autor(es): dc.creatorRezende, M. V. S.-
Autor(es): dc.creatorSimoes, A. Z. [UNESP]-
Autor(es): dc.creatorTeixeira, V. C.-
Autor(es): dc.creatorRamirez, M. A. [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T01:00:29Z-
Data de disponibilização: dc.date.available2022-02-22T01:00:29Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-01-04-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jallcom.2020.156652-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/210464-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/210464-
Descrição: dc.descriptionCaCu3Ti4O12 (CCTO): x% W (x = 0.00, 0.02, 0.05, 0.10, 2.50, and 5.00) powders were prepared via solid-state reaction. The effect of W addition in the (micro)structure and optical properties was analyzed using computing simulations and experimental techniques. The widespread application of perovskite-lightemitting diodes (PeLED5), photovoltaic devices, and photocatalysis is limited by the intrinsic instability of the perovskite materials (e.g., metal halides), compromising operational efficiency, and pushing for the development of novel perovskite materials. The Rietveld analysis and XPS results confirm the presence of W5+, Ti3+, and Cu+ ions in all samples of the CaCu3Ti4O12 : x% W system, leading to structural changes that strongly influence the PL response of the material. Based on a correlation approach, a practical model explaining the relationship between electronic defects and photoluminescent (PL) emissions in the CCTO system is proposed. On samples x = 0.00, 0.10, and 5.00, red PL emissions are due to the presence of metal vacancies, and deep-level defects, while blue PL emissions on samples x = 0.02, 0.05, and 2.50 are associated with shallow defects. Thus, our research shows evidence that CaCu3Ti4O12 (CCTO): W ceramic systems may be promising to photonics applications. (C) 2020 Elsevier B.V. All rights reserved.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionSao Paulo State Univ, Fac Engn Guaratingueta, UNESP, Av Dr Ariberto Pereira da Cunha 333, BR-12516410 Guaratingueta, SP, Brazil-
Descrição: dc.descriptionFed Univ Sergipe UFS, Ctr Exact Sci & Technol CCET, Dept Phys, Marechal Rondon S-N, BR-49100000 Sao Cristovao, SE, Brazil-
Descrição: dc.descriptionBrazilian Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083970 Campinas, SP, Brazil-
Descrição: dc.descriptionSao Paulo State Univ, Fac Engn Guaratingueta, UNESP, Av Dr Ariberto Pereira da Cunha 333, BR-12516410 Guaratingueta, SP, Brazil-
Descrição: dc.descriptionFAPESP: 2018/18236-4-
Formato: dc.format17-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier B.V.-
Relação: dc.relationJournal Of Alloys And Compounds-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectCaCu3Ti4O12-
Palavras-chave: dc.subjectX-ray absorption-
Palavras-chave: dc.subjectPhotoluminescence-
Palavras-chave: dc.subjectAtomistic modeling-
Título: dc.titleTunable photoluminescence of CaCu3Ti4O12 based ceramics modified with tungsten-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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