1% Er, 10% Yb, and x% Mo (x = 0, 1, 3, 5, and 8% mol) co-doped CaZrO3 phosphors were prepared through a solid-state reaction. Er(NO3)3·5H2O (99.99%), Yb(NO3)3·5H2O (99.99%), (NH4)6Mo7O24 (99.9%), ZrO2 (99.9%), and CaCO3 (99.9%) were utilized as precursors. The precursors were ground using an agate mortar for 1 h and then treated at 500 °C for 5 h. Next, the powder mixture was ground again for 1 h and incubated at 900 °C for 5 h. Finally, the homogeneous powders were further calcined at 1300 °C for 5 h. All investigated samples were labeled (Table 1 ).
Their structural property was characterized using an X-ray diffractometer (Bruker D8 Advance). Their morphological property was analyzed using high-resolution scanning electron microscopy (JEM 1010, JEOL Technique, Japan). Diffuse reflectance spectra were recorded using a Varian Cary 5000 UV-vis-NIR spectrophotometer. The luminescence properties of UC and DC were recorded using a NANO LOG spectrometer (Horiba, USA) equipped with a 975 nm laser radiation source and heat controller. The Rietveld refinement structure of phosphors was obtained using FullProf software.
Their structural property was characterized using an X-ray diffractometer (Bruker D8 Advance). Their morphological property was analyzed using high-resolution scanning electron microscopy (JEM 1010, JEOL Technique, Japan). Diffuse reflectance spectra were recorded using a Varian Cary 5000 UV-vis-NIR spectrophotometer. The luminescence properties of UC and DC were recorded using a NANO LOG spectrometer (Horiba, USA) equipped with a 975 nm laser radiation source and heat controller. The Rietveld refinement structure of phosphors was obtained using FullProf software.