Photoluminescence of Eu3+-doped CaZrO3 red-emitting phosphors synthesized via microwave-assisted hydrothermal method

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Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.creatorCosta Macedo, Wagner [UNESP]-
Autor(es): dc.creatorGermano Bispo Junior, Airton [UNESP]-
Autor(es): dc.creatorde Oliveira Rocha, Kleper [UNESP]-
Autor(es): dc.creatorde Souza Albas, Agda Eunice [UNESP]-
Autor(es): dc.creatorPires, Ana Maria [UNESP]-
Autor(es): dc.creatorRainho Teixeira, Silvio [UNESP]-
Autor(es): dc.creatorLongo, Elson-
Data de aceite: dc.date.accessioned2022-02-22T00:33:57Z-
Data de disponibilização: dc.date.available2022-02-22T00:33:57Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-09-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.mtcomm.2020.100966-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/201597-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/201597-
Descrição: dc.descriptionEu-doped 1, 3 and 5 % CaZrO3 red-emitting phosphors were synthesized for the first time using the microwave-assisted hydrothermal method followed by heat treatment at 1200 °C. After the crystallization, the orthorhombic CaZrO3 and the non-stoichiometric cubic Ca0.15Zr0.85O 1.85 phases were identified for all samples, and the portion of the non-stoichiometric phase increases as the Eu3+ concentration increases. The excitation spectra of the phosphors display Eu3+ f-f excitation bands (namely at 395 nm and 464 nm) and the Eu3+→O2- charge transfer band at 250 nm, confirming that the CaZrO3 host acts as sensitizer for the Eu3+ luminescence. Likewise, the emission spectra feature the typical Eu3+ emission within the red spectral region, displaying CIE color coordinates of (0.642; 0.332), (0.663; 0.330) and (0.668; 0.327) for the 1, 3 and 5 % doped samples, respectively, indicating high emission color purity. By using Eu3+ as spectroscopic probe, the high-resolution selective emission spectra (14 K) confirm that Eu3+ replaces Ca2+ and Zr4+ local sites in both CaZrO3 and the Ca0.15Zr0.85O1.85 phases. Finally, the high absolute emission quantum yield of the 3 %-doped phosphor found at 393 nm (0.29 ± 0.03) confirms its potential application as red-emitting phosphor, especially in rapid identification of latent fingerprints, security ink or as red-emitting coating of near-UV LEDs for WLED applications.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionSão Paulo State University (UNESP) Dept. of Physics and Dept. of Chemistry-
Descrição: dc.descriptionSão Paulo State University (UNESP) Dept. of Chemistry-
Descrição: dc.descriptionFederal University of São Carlos (UFSCar) CDMF-
Descrição: dc.descriptionSão Paulo State University (UNESP) Dept. of Physics and Dept. of Chemistry-
Descrição: dc.descriptionSão Paulo State University (UNESP) Dept. of Chemistry-
Descrição: dc.descriptionCNPq: 573636/2008-7-
Idioma: dc.languageen-
Relação: dc.relationMaterials Today Communications-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectLuminescence-
Palavras-chave: dc.subjectMicrowave-assisted hydrothermal method-
Palavras-chave: dc.subjectRed-emitting phosphors-
Palavras-chave: dc.subjectSolid-state lighting-
Título: dc.titlePhotoluminescence of Eu3+-doped CaZrO3 red-emitting phosphors synthesized via microwave-assisted hydrothermal method-
Tipo de arquivo: dc.typelivro digital-
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