Effect of lithium excess on the LiAl5O8:Eu luminescent properties under VUV excitation

Teixeira, Verônica de Carvalho; Rodrigues, Lucas Carvalho Veloso; Galante, Douglas; Rezende, Marcos Vinícius dos Santos

Use este identificador para citar ou linkar para este item: https://ri.ufs.br/jspui/handle/riufs/25644

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Campo DC	Valor	Idioma
dc.contributor.author	Teixeira, Verônica de Carvalho	-
dc.contributor.author	Rodrigues, Lucas Carvalho Veloso	-
dc.contributor.author	Galante, Douglas	-
dc.contributor.author	Rezende, Marcos Vinícius dos Santos	-
dc.date.accessioned	2026-07-23T18:37:28Z	-
dc.date.available	2026-07-23T18:37:28Z	-
dc.date.issued	2016-09	-
dc.identifier.citation	TEIXEIRA, V. C. et al. Effect of lithium excess on the LiAl5O8:Eu luminescent properties under VUV excitation. Optical Materials Express, Washington, v. 6, n. 9, set. 2016. Disponível em: https://opg.optica.org/ome/fulltext.cfm?uri=ome-6-9-2871. Acesso em: 23 jul. 2026.	pt_BR
dc.identifier.issn	2159-3930	-
dc.identifier.uri	https://ri.ufs.br/jspui/handle/riufs/25644	-
dc.language	eng	pt_BR
dc.publisher	Optical Society of America	pt_BR
dc.relation.ispartof	Optical Materials Express	pt_BR
dc.subject	Spectroscopy	eng
dc.subject	Fluorescence	eng
dc.subject	Fluorescent and luminescent materials	eng
dc.subject	Rare-earth-doped materials	eng
dc.subject	Photoluminescence	eng
dc.subject	Luminescence	eng
dc.subject	Ultraviolet vacuum	eng
dc.subject	Synchrotron radiation	eng
dc.title	Effect of lithium excess on the LiAl5O8:Eu luminescent properties under VUV excitation	pt_BR
dc.type	Artigo	pt_BR
dc.identifier.license	Creative Commons Atribuição 4.0 Internacional (CC BY 4.0)	pt_BR
dc.description.resumo	The influence of lithium excess and calcination temperature on the luminescence properties of the LiAl5O8:Eu under VUV excitation was investigated. The presence of both broad bands and sharp peaks in the VUV and X-ray emission spectra suggests the presence of Eu2+, even in absence of reducing atmosphere in the synthesis. The VUV excitation spectra indicated a band gap of 8.5 eV while the UV excited one showed the Eu3+ charge transfer transition starting at 3.9 eV. These values indicate that Eu2+ is stable in this host since its ground state is below the Fermi level of the host (ca. 4.1 eV). The relation between the intensity of Eu2+ and Eu3+ emissions showed that the reduction is favored at higher temperatures and lower Li content, leading to the proposition of a reduction mechanism based on the incorporation of charge compensation defects formed in the aliovalent doping of Eu3+ in Li+ sites.	pt_BR
dc.description.local	Washington	pt_BR
dc.identifier.doi	https://doi.org/10.1364/OME.6.002871	-
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