Figure 3

Optical emission spectra of KGd0.996Ce0.004(PO3)4 under 244, 226, 214 and 194 nm excitation. Labels in purple (inset) indicate the transitions of Gd3+ and labels in pink those of Ce3+.

Optical emission spectra of KGd0.996Ce0.004(PO3)4 under 244, 226, 214 and 194 nm excitation. Labels in purple (inset) indicate the transitions of Gd3+ and labels in pink those of Ce3+.