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- Title
Optical Properties of Molybdates Containing a Combination of Rare-Earth Elements.
- Authors
Dorzhieva, S. G.; Sofich, D. O.; Bazarov, B. G.; Shendrik, R. Yu; Bazarova, J. G.
- Abstract
We have synthesized new molybdates, Cs2LnZrTi(MoO4)6.5 (Ln = Eu + Yb, Eu + Dy, and Gd + Dy lanthanides), containing pairs of rare-earth elements in the ratio 1 : 1. The synthesized compounds have been shown to be single-phase and isostructural with each other. We have determined their crystallographic characteristics and assessed their thermal stability. In the dysprosium-containing molybdates, the Dy3+ luminescence intensity is low as a result of concentration quenching. The molybdate containing the Eu + Dy pair of rare-earth elements shows predominant high-intensity luminescence in the red spectral region. In addition to usual infrared emission due to ytterbium, the Eu + Yb compound demonstrates emission in the ultraviolet spectral region. We have measured luminescence decay kinetic characteristics at the peak emission wavelengths. In the case of the molybdate containing the Eu + Yb pair of rare-earth elements, energy transfer from europium ions to ytterbium has been observed. We have demonstrated high-intensity luminescence that can be excited both on intraconfigurational transitions and in the region of charge transfer bands of oxygen–molybdenum complexes.
- Subjects
OPTICAL properties; MOLYBDENUM; MOLYBDATES; RARE earth metals; YTTERBIUM ions; CHARGE transfer; CHEMICAL synthesis
- Publication
Inorganic Materials, 2021, Vol 57, Issue 1, p54
- ISSN
0020-1685
- Publication type
Article
- DOI
10.1134/S0020168521010040