Synthesis and optical properties of the crystalline phase Tb2TeO6
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2022
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Tb2TeO6 crystalline phase was prepared by solid-state reaction synthesis, presenting an orthorhombic structure
with lattice parameters a = 5.2907(2) Å, b = 9.1079(30 Å, and c = 10.0113(3) Å. Thermal analysis measurements revealed two distinct thermal events, one of them associated to phase decomposition around 1230 ◦C and
another more complex from 300 ◦C up to 1100 ◦C probably related to the Tb3+/Tb4+ oxidation reaction. The
optical band gap was estimated to 4.36 eV. A high reflectance in the visible and near infrared regions was
measured, as well the photoluminescence with bands centered at λ = 490, 548, 585, and 620 nm, attributed to
electronic transitions of Tb3+ ions.
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Tb3+, Terbium tellurate, Luminescence, Lanthanide tellurates
Citação
FERREIRA, K. D. et al. Synthesis and optical properties of the crystalline phase Tb2TeO6. Solid State Sciences, Amsterdam, v. 134, e107054, 2022. DOI: 10.1016/j.solidstatesciences.2022.107054. Disponível em: https://www.sciencedirect.com/science/article/pii/S1293255822002497. Acesso em: 6 fev. 2024.