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Artigo Produção Nacional Revisado por pares
BIBTEX RIS

Valences of dopants in Eu 2+ persistent luminescence materials

2014; IOP Publishing; Volume: 89; Issue: 4 Linguagem: Inglês

10.1088/0031-8949/89/04/044004

ISSN

1402-4896

Autores

Mika Lastusaari, Hermi F. Brito, Stefan Carlson, Jorma Hölsä, Taneli Laamanen, Lucas Carvalho Veloso Rodrigues, Edmund Welter,

Tópico(s)

Glass properties and applications

Resumo

The existence and effect of different rare earth (R2+/3+/IV) ions in SrAl2O4:Eu2+, R3+ and M2MgSi2O7:Eu2+, R3+ (M: Sr, Ba) persistent luminescence materials was studied with XANES (x-ray absorption near edge structure) measurements at HASYLAB/DESY (Hamburg, Germany) and MAX-lab (Lund, Sweden). The experiments were carried out at 298K for selected rare earth (co-) dopants (Eu2+; Ce3+, Nd3+, Sm3+, Dy3+ and Yb3+). The co-existence of Eu2+ and Eu3+ was observed in all materials. The co-dopants were always in the trivalent form.

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