Abstract
In this study, L-threonine containing trivalent europium ions (LTHEu) was successfully grown through the slow evaporation method. The LTHEu single crystal exhibit well-defined facets, with dimensions around 5 × 13 × 4 mm. Structural, thermal, and spectroscopic properties were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy, X-ray fluorescence (XRF), thermogravimetric analysis, differential thermal analysis, ultraviolet–visible absorption spectroscopy, and photoluminescence spectroscopy. Rietveld refinement of XRD data showed that the LTHEu crystal crystallizes in an orthorhombic system with P212121-space group. The Eu3+ ions promote an expansion effect on the unit cell volume. XRF measurements confirm the presence of the Eu3+-impurities in the L-threonine matrix. In addition, the LTHEu crystal showed thermal stability for temperatures up to 483 K. Spectroscopic analysis revealed light emission with orange color due to the combination of high-intensity bands related to 5D0→7F1 (orange) and 5D0→7F2 (red) electronic transitions of Eu3+ ions. The new emission for L-threonine crystal doped with Eu3+ observed in this study expands the range of materials with potential for application in optical devices in the visible region.
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Data can be available from the corresponding author (joaogomes.quimico@gmail.com) upon academic reasonable request.
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Acknowledgements
The authors are grateful the Brazilian agencies: CAPES, FAPEMA (BPD-12643/22), and CNPq for financial support. We also thank Foundation for Science and Technology (FCT), Portugal (Strategic Projects UID/NEU/04539/2013 and UID/NEU/04539/2019) and COMPETE-FEDER (POCI-01-0145-FEDER-007440).
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This research was supported by the Brazilian agencies: CAPES – Finance Code 001, CNPq, FINEP, and FAPEMA - (BPD-12643/22).
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All authors contributed to the study conception and design development. JGON, JVM, OCSN, and JOC performed materials preparation, data collection, analysis, and writing—original draft. LMS, FM, and AAMM performed conceptualization and reviewing. AOS performed the original review, correction and editing, resources, and supervision.
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de Oliveira Neto, J.G., Marques, J.V., da Silva Neto, O.C. et al. Investigation of the structural, thermal, and spectroscopic properties of L-threonine crystal containing Eu3+ ions for use in visible light-emitting devices. J Mater Sci: Mater Electron 34, 1705 (2023). https://doi.org/10.1007/s10854-023-11107-0
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DOI: https://doi.org/10.1007/s10854-023-11107-0