“…4(a)) corresponding to the 7 F 0 → 5 D 4 , 7 F 0 → 5 L 7 , 7 F 0 → 5 L 6 , 7 F 0 → 5 D 3 , 7 F 0 → 5 D 2 , and 7 F 1 → 5 D 1 transitions. 43,44 Fig. 5(b) shows the emission spectra of the optimal phosphor with the excitation wavelengths of 300, 395, 466, and 527 nm.…”