Influence of Mn ions on the structure and spectral properties of BaYF: Yb/Ho phosphors

In this paper, 1%Ho, 8%Yb; x%Mn: BaYF 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 BaYF phosphors in the valence state of Mn ions, and the doped Yb, Ho, and Mn ions did not change the structure of BaYF, 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 Mn ions, the relative intensity is increased by 2.79 times and 7.04 times, and the optimal Mn doping concentration was determined to be 4%. Finally, the energy transfer between Ho and Mn ions was explored. It shows that BaYF: Ho, Yb phosphors doped with transition metal Mn are used as up-conversion luminescent materials and have important potential applications in the fields of biomarkers, high-resolution imaging, and solar cells.