Abstract
In this study, we co-doped Mn4+ and Yb3+ into double perovskite K0.5La0.5SrMgWO6 to prepare a new phosphor. The structure and luminescent properties of the material were characterized by powder X-ray diffraction (XRD) and photoluminescence excitation (PLE) and emission (PL) spectroscopy. Under near-ultraviolet (n-UV) excitation, Mn4+- Yb3+ co-doped samples exhibited strong FR emission (600–800 nm) and Yb3+ near-infrared emission (900–1150 nm). Studied the energy transfer process from Mn4+ to Yb3+ in K0.5La0.5SrMgWO6: 1.5%Mn4+/1.5%Yb3+. In addition, K0.5La0.5SrMgWO6: 1.5%Mn4+/1.5%Yb3+ exhibits good thermal stability, maintaining a comprehensive fluorescence intensity of 98.37 % at 100 °C compared to 25 °C. These results indicate that the newly synthesized K0.5La0.5SrMgWO6: 1.5%Mn4+/1.5%Yb3+ phosphor has potential application prospects.
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