photoluminescence measurements. Two notable emission peaks associated with the 5 D
0→ 7 F 2 transition in the Eu 3+ ions were governed by Mg codopants, which corresponded
to the change of the dominant peak wavelength from 622.3 to 620.3 nm with an increase in
Mg concentration. An optimal amount of Mg also led to enhancement of approximately 20
times of the Eu 3+ luminescence. These results indicated that the Mg codopants selectively …