Influence of Mn2+ ions on the structure and spectral properties of BaY2F8: Yb3+/Ho3+ phosphors

In this paper, 1%Ho3+, 8%Yb3+; x%Mn2+: BaY2F8 phosphors were successfully prepared by the co-precipitation method combined with the fluorinated atmosphere sintering method. The samples were characterized by X-ray diffraction, scanning electron microscope, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, photoluminescence spectroscopy, and up-conversion fluorescence decay curve test. The results showed that the Mn element was doped into BaY2F8 phosphors in the valence state of Mn2+ ions, and the doped Yb3+, Ho3+, and Mn2+ ions did not change the structure of BaY2F8, and under 980 nm laser pumping, the emission peaks of the phosphors were at 544 nm and 660 nm, which are green and red luminescence, respectively. Through the modification of Mn2+ ions, the relative intensity is increased by 2.79 times and 7.04 times, and the optimal Mn2+ doping concentration was determined to be 4%. Finally, the energy transfer between Ho3+ and Mn2+ ions was explored. It shows that BaY2F8: Ho3+, Yb3+ phosphors doped with transition metal Mn2+ are used as up-conversion luminescent materials and have important potential applications in the fields of biomarkers, high-resolution imaging, and solar cells.

Automated summary

In this paper, 1%Ho3+, 8%Yb3+ and x%Mn2+: BaY2F8 phosphors were prepared and characterized. The results showed the successful doping of Mn2+ ions into BaY2F8 phosphors and the change in relative emission intensity. The phosphors have potential applications in biomarkers, high-resolution imaging, and solar cells.