Fig. 1. Phase analysis of sample. (a) XRD patterns of CaMgSiO₄∶2% Sm³⁺, y% Li⁺(y = 0, 0.5, 1, 1.5, 2); (b) crystal structure of CaMgSiO₄

Fig. 2. Variation of unit cell parameters of CaMgSiO₄∶2% Sm³⁺, y% Li⁺(y = 0, 0.5, 1, 1.5, 2) with doping concentration of Li⁺. (a) Variation of a; (b) variation of b; (c) variation of c; (d) variation of v

Fig. 3. Morphology analysis of CaMgSiO₄∶2% Sm³⁺ phosphor. (a)~(b) SEM image; (c) EDS and mol fraction of atoms of each element

Fig. 4. Fluorescence spectra of CaMgSiO₄∶x% Sm³⁺(x = 1, 1.5, 2, 2.5) phosphor samples. (a) Excitation spectra; (b) emission spectra

Fig. 5. Concentration quenching mechanism diagram of CaMgSiO₄∶ x% Sm³⁺(x = 1, 1.5, 2, 2.5)

Fig. 6. Fluorescence performance of CaMgSiO₄∶2% Sm³⁺, y% Li⁺. (a) Emission spectra of CaMgSiO₄∶2% Sm³⁺ and CaMgSiO₄∶2% Sm³⁺, 1.5% Li⁺ phosphors; (b) relationship between integrated area at 601 nm in emission spectrum of CaMgSiO₄∶2% Sm³⁺, y% Li⁺ and concentration of Li⁺

Fig. 7. Life decay curves and emission mechanism. (a) Life decay curves of CaMgSiO₄∶2% Sm³⁺, y% Li⁺ samples at 601 nm; (b) emission mechanism of CaMgSiO₄∶Sm³⁺ phosphors

Fig. 8. Color coordinates of CaMgSiO₄∶2% Sm³⁺, 1.5% Li⁺ sample, illustrated as photos of 365 nm excitation of fluorescent lamps and near-ultraviolet lamps

Fig. 9. Normalized peak intensities of CaMgSiO₄∶2% Sm³⁺, 1.5% Li⁺ sample as a function of temperature