Abstract
Uniform and well-dispersed Lu(OH)CO3 and Lu2O3 spheres with adjustable diameters have been prepared by a homogeneous precipitation route with different auxiliary solvents (ethylene glycol, ethanol, or isopropanol). The average particle sizes of the precursors are determined to be 180, 195, and 225 nm with ethylene glycol, ethanol, and isopropanol as auxiliary solvent, resulting in the corresponding Lu2O3 products with a variety of particle sizes (130, 155, and 180 nm) after an annealing process. The difference in particle size of the samples can be attributed to the variation of boiling point, viscosity, and dielectric constant of auxiliary solvents. Under ultraviolet (UV) or near infrared (NIR) excitation, the lanthanide activator ions Ln3+ (Eu3+, Tb3+, Yb3+/Er3+, and Yb3+/Ho3+) doped phosphors show intense characteristic down-conversion or up-conversion multicolor emissions of the activator ions. The emission intensities of the phosphors are proportional to their particle sizes: the bigger the diameters, the stronger the emission intensity. Furthermore, the LED devices manufactured by the phosphors and LED chips exhibit bright characteristic emissions of Ln3+ ions, indicating that as-synthesized phosphors may be potentially applied in fields of LEDs and optoelectronic devices.
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Funding
This research was supported by the Natural Science Foundation of Hebei Province (E2020201033), the Second Batch of Top Youth Talent Support Program of Hebei Province, the Priority Strategy Project of the Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education (ts2019005), Excellent Youth Scientific Research and Innovation Team of Hebei University (605020521003), and Post-Graduate’s Innovation Fund Project of Hebei University (HBU2021ss022).
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All authors contributed to the study conception and design. Material preparation, data curation and analysis were performed by XJ, JT, JW, and HK. The first draft of the manuscript was written by XJ and JT. Conceptualization, methodology, writing-review and editing, and project administration were performed by CZ and GJ. All authors read and approved the final manuscript.
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Jia, X., Tang, J., Wang, J. et al. Influence of solvents on particle size and luminescence performance of monodisperse spherical lutetium compounds. J Mater Sci: Mater Electron 33, 3186–3197 (2022). https://doi.org/10.1007/s10854-021-07520-y
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DOI: https://doi.org/10.1007/s10854-021-07520-y