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Novel color-tunable K3Y(BO3)2:RE3+ (RE = Tb3+, Eu3+, Tb3+/Eu3+) phosphors for near-UV white LEDs

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Abstract

In this study, several borate phosphors K3Y(BO3)2:RE3+ (RE = Tb3+, Eu3+, Tb3+/Eu3+) with adjustable luminescence color were synthesized by the traditional high-temperature solid-phase method. The crystal-phase composition, particle morphology, luminescence properties, and thermal stability of phosphors were studied by XRD, SEM, PL-PLE, FLT, DRS, and variable temperature fluorescence spectrum. Results show that no impurity is produced in the phosphors. The excitation spectra of single-doped K3Y1-x(BO3)2:xTb3+ and single-doped K3Y1-y(BO3)2: yEu3+ overlap at 484 nm. K3Y0.89(BO3)2:0.11Tb3+, yEu3+ phosphors emit red and yellow–green light when excited at a wavelength of 377 nm. When Eu3+ concentration increases from 0.005 to 0.07, the emission intensity of Tb3+ decreases gradually, while that of Eu3+ increases gradually, which proves that Tb3+ → Eu3+ energy transfer exists. The Tb3+ → Eu3+ energy transfer efficiency reaches 53.54%, and energy transfer probability reaches 81.49%. At 377 nm, the co-doped phosphor color can range in the region of green, yellow, orange–red, and red. K3Y(BO3)2:Tb3+/Eu3+ phosphor can be applied in the field of LEDs excited by near-ultraviolet light.

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Data availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

This work was supported by the Natural Science Foundation of Inner Mongolia 2018MS02002 and Inner Mongolia Autonomous Region universities basic scientific research project.

Funding

Natural Science Foundation of Inner Mongolia Autonomous Region, 2018MS02002, Wenyu Zhao

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  1. School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology, Baotou, China

    Chaofan Zhang, Yaming Liang, Qimeng Xu & Wenyu Zhao

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Contributions

Chaofan Zhang (First Author): Methodology, Investigation, and Writing of the original draft; Yaming Liang: Data analysis; Qimeng Xu: Sample preparation; Wenyu Zhao (Corresponding author): Fund resources, Supervision, and Reviewing and editing of the manuscript.

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Correspondence to Wenyu Zhao.

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Zhang, C., Liang, Y., Xu, Q. et al. Novel color-tunable K3Y(BO3)2:RE3+ (RE = Tb3+, Eu3+, Tb3+/Eu3+) phosphors for near-UV white LEDs. J Mater Sci: Mater Electron 35, 1171 (2024). https://doi.org/10.1007/s10854-024-12918-5

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