Luminescence properties of rare earth ions in polytantalate

The luminescence properties of R3+ (R3+=Eu3+, Tb3+, Tm3+) in La1−xRxTa7O19 solid solution were systematically examined. In this host lattice, the distance between nearest neighbors of the La3+ site which were substituted by the R3+ ions, were very long (about 0.62 nm) and the sites locate two-dimens...

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Published inJournal of alloys and compounds Vol. 275-277; pp. 746 - 749
Main Authors Kubota, Shun-ichi, Yamane, Hiasanori, Shimada, Masahiko, Takizawa, Hirotsugu, Endo, Tadashi
Format Journal Article
LanguageEnglish
Published Elsevier B.V 24.07.1998
Subjects
Energy migration
Luminescence
Rare earth
Tantalate
Rare earth
Tantalate
Energy migration
Luminescence
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Summary:The luminescence properties of R3+ (R3+=Eu3+, Tb3+, Tm3+) in La1−xRxTa7O19 solid solution were systematically examined. In this host lattice, the distance between nearest neighbors of the La3+ site which were substituted by the R3+ ions, were very long (about 0.62 nm) and the sites locate two-dimensionally. The critical concentration at which the concentration quenching occurred under UV excitation were x=1.0 in La1−xEuxTa7O19, x=0.9 in La1−xTbxTa7O19 and x=0.14 in La1−xTmxTa7O19. Furthermore the energy migration process of these samples were investigated.
ISSN:0925-8388
1873-4669
DOI:10.1016/S0925-8388(98)00426-5