Violet and near-ultraviolet upconversion luminescence in La3Ga5.5Ta0.5O14 codoped with Er3+ and Yb3

Violet (410nm, 2H9/2→4I15/2) and near-ultraviolet (380nm, 4G11/2→4I15/2) upconversion luminescence, were obtained for the first time in Er:Yb:La3Ga5.5Ta0.5O14 ceramic sample, synthesized by solid-state reaction, by pumping at 973nm. Yb3+–Er3+ energy transfer processes accounting for population of th...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2013-03, Vol.413, p.55-58
Main Authors: Georgescu, S., Voiculescu, A.M., Matei, C., Stefan, A.G., Toma, O.
Format: Article
Language:English
Subjects:
Accounting
Ceramics
Condensed matter
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Emittance
Energy transfer
Er3
Exact sciences and technology
Langatate
Luminescence
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Other solid inorganic materials
Photoluminescence
Physics
Pumping
Rare earth
Upconversion
Yb3
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Description
Summary:Violet (410nm, 2H9/2→4I15/2) and near-ultraviolet (380nm, 4G11/2→4I15/2) upconversion luminescence, were obtained for the first time in Er:Yb:La3Ga5.5Ta0.5O14 ceramic sample, synthesized by solid-state reaction, by pumping at 973nm. Yb3+–Er3+ energy transfer processes accounting for population of the emitting levels are discussed. The lifetime of the emitting level 2H9/2, responsible for violet luminescence, was measured and its quantum efficiency was estimated.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2012.12.045