The change of emission spectra in Y_2O_2S:Sm~(3+),Mg~(2+),Ti~(4+)and Y_2O_2S:Tb~(3+),Mg~(2+),Ti~(4+) were studied though altering the concentration of activator.

• 通过改变掺杂激活剂离子的含量,分析了合成样品Y_2O_2S:Sm~(3+),Mg~(2+),Ti~(4+)和Y_2O_2S:Tb~(3+),Mg~(2+),Ti~(4+)中发射光谱的变化。