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研究了xSrO·yAl2 O3 Eu体系的光致发光 ;发现当y x <1.5时 ,产生余辉较短的红色发光 ,属于Eu3+ 离子 4f→ 4f特征跃迁发射 .当y x >1.5时 ,产生具有超长余辉的绿色或蓝色发光 ,属于Eu2 + 离子 5d→ 4f特征跃迁发射
The photoluminescence of xSrO · yAl2 O3 Eu system has been studied. It is found that when yx is less than 1.5, red luminescence with shorter afterglow is generated and belongs to the characteristic transition emission of 4f → 4f Eu3 + ions. When yx> 1.5, Green or blue light, belongs to the Eu2 + ion 5d → 4f characteristic transition emission