采用共沉淀法结合高温固相法, 在碳还原气氛下合成了SrCO3∶Mn2+绿色荧光粉, 用XRD和荧光光谱分别对样品的结构和发光性能进行了表征。XRD结果证实, 样品为单一斜方晶系的SrCO3相; 荧光光谱检测表明, 样品在267 nm左右紫外线激发下, 产生峰位位于547 nm的明亮绿光, 对应于Mn2+的4T1(4G)→6A1(6S)电子跃迁。样品的最佳烧结温度为1 000 ℃, Mn2+的最佳掺杂摩尔分数为2.0%。

The green-emitting phosphors SrCO3∶Mn2+ were successfully synthesized by conventional solid-state reaction combined with co-precipitation method in a carbon-reducing atmosphere. The photoluminescent pro-perties and crystal structure of the samples were investigated by fluorescence spectroscopy and X-ray diffraction, respectively. XRD results showed that the phosphors possess pure trimetric crystal structure. And the PL spectra showed a strong broad-band green color emission located at 500~600 nm (λex=267 nm) correspon-ding to the 4T1(4G) →6A1(6S) transitions of Mn2+ ion in SrCO3∶Mn2+ phosphors. The optimum sintering temperature is about 1 000 ℃ and the best doping concentration is 2.0% in mole fraction. A strong concentration quenching effect is presented at the concentration of x(Mn2+)＞2.0%.