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Effects of rare earth ions on structural, morphological and photoluminescent properties of non-stoichiometric LiNbO3

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Abstract

The pseudo-ilmenite structure ABO3 have been increasingly highlighted in the optoelectronic area. Nanoparticles of undoped lithium niobates (LiNbO3) and codoped with rare earths (LiNbO3: Dy3+/Tb3+) were synthesized by the solid-state reaction method and calcined in a controlled way. The properties and structural changes of niobates were evaluated from data obtained in XRD and Rietveld refinement. The SEM-FEG micrographs showed different morphologies obtained (cubes, plates, tetrahedrons and polyhedra) according to the variation of the doping and co-doping process. Optical properties were measured and studied based on the results obtained from the UV-Vis spectrophotometer and photoluminescence assays. The photoluminescence presented by LiNbO3 was associated with the existence of superficial defects in the particles, i.e., centers of recombination of photogenerated charges favorable to the property. The effect of concentration of dopants was investigated in properties photoluminescence. Photometric measurements (CRI, purity, CCT, LER) were analyzed and a modulation of the emitted color as a function of the concentration of the dopants. According to the obtained results, LiNbO3: Dy3+/Tb3+ presents itself as a material with great potential in optical device applications.

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The authors declare that the data supporting the findings of this study are available within the paper and its Supplementary Information files. Should any raw data files be needed in another format they are available from the corresponding author upon reasonable request. Source data are provided with this paper.

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Authors and Affiliations

  1. Special Coordination of Materials Engineering, Federal University of Santa Catarina, Blumenau, Santa Catarina, Brazil

    L. X. Lovisa

  2. LSQM – Laboratory of Chemical Synthesis of Materials, Department of Materials Engineering, Federal University of Rio Grande do Norte, P.O. Box 1524, Natal, 59078-900, RN, Brazil

    T. B. O. Nunes, M. R. D. Bomio & F. V. Motta

  3. Institute of Physics and Chemistry, Federal University of Itajubá - UNIFEI, Itajubá, MG, Brazil

    E. C. Tavares & R. C. L. Machado

  4. Department of Exact Sciences and Education, Federal University of Santa Catarina, Blumenau, Santa Catarina, Brazil

    L. F. Dos Santos

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Authors contribution statement

The contribution of each author is described below: 

L.X. Lovisa: Contribution to the discussion of the results of X-ray diffraction, microscopy and photoluminescence.

T.B.O. Nunes: Article writing. Conceptualization.

E. C. Tavares: Contribution to the discussion of the results and review of the work.

R.C.L. Machado: Carrying out chemical syntheses to obtain the material.

L.F. Dos Santos: Performing photoluminescent measurements.

M.R.D. Bomio: Enabled microscopy measurements, x-ray diffraction analysis and UV-visible spectroscopy.

F.V. Motta: Enabled microscopy measurements, x-ray diffraction analysis and UV-visible spectroscopy.

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Lovisa, L.X., Nunes, T.B.O., Tavares, E.C. et al. Effects of rare earth ions on structural, morphological and photoluminescent properties of non-stoichiometric LiNbO3. Appl. Phys. A 130, 226 (2024). https://doi.org/10.1007/s00339-024-07399-6

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