Abstract
Emission-tunable La9.33Si6O26:Ce3+,Tb3+,Sm3+ (LS:Ce3+,Tb3+,Sm3+) phosphors were designed by solid-state reaction for different applications. Their photoluminescence (PL) properties under ultraviolet light excitation were studied in detail. The single-phase structures were determined by the XRD patterns. The PL spectra of the Ce3+-activated samples exhibited broad luminescence bands, where two different Ce3+ emission centers were determined. In the Ce3+-Tb3+ codoped samples, an efficient energy transfer (ET) was witnessed with the spectral characteristics and decay curves. Owing to this ET, the emission color can be tuned from bluish violet to light green. When the Ce3+-Tb3+-Sm3+ ions were tri-doped, two ET processes for Ce3+ → Sm3+ and Tb3+ → Sm3+ appeared simultaneously. As a result, the white emission was successfully achieved in the LS:0.5%Ce3+,4%Tb3+,3%Sm3+ phosphor. The thermally luminescent stability revealed that the thermal quenching temperature T0.5 of this phosphor is higher than many other reported phosphors. The device fabrication was made with the LS:Ce3+,Tb3+,Sm3+ phosphor, which can show visible or invisible pattern depending on the excitation light. The above investigations indicate that the developed LS:Ce3+,Tb3+,Sm3+ phosphors have potential applications in white LEDs and anticounterfeiting.
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Funding
This work was supported by the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (20KJA430007) and Foundation of Jiangsu College students Innovation and Entrepreneurship (202210323041Z).
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by JF, ZX, ZC, HS and HW. The first draft of the manuscript was written by JF and JZ and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Jianjie Fan, Zihan Xu, Zhangyuan Chen, Haiming Shi, Han Wu, and Jia Zhang declare they have no financial interests.
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Fan, J., Xu, Z., Chen, Z. et al. Tunable emissions in single-phase La9.33Si6O26:Ce3+,Tb3+,Sm3+ phosphors for multifunctional applications. J Mater Sci: Mater Electron 35, 95 (2024). https://doi.org/10.1007/s10854-024-11921-0
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DOI: https://doi.org/10.1007/s10854-024-11921-0