SrCO_3∶Mn^(2+)绿色荧光粉的合成和发光性能  

Synthesis and Luminescent Properties of The Green-emitting SrCO_3∶Mn^(2+) Phosphors

作　　者：梁玉军[1] 江庆军[1] 李永周[1] 涂东[1] 金萍[1] 杨文龙[1] 

机构地区：[1]中国地质大学(武汉)材料科学与化学工程学院,湖北武汉430074

出　　处：《发光学报》2011年第4期337-341,共5页Chinese Journal of Luminescence

基　　金：广东省省部产学研结合项目(2010B090400437);中央高校基本科研业务费专项基金(CUG090108)资助

摘　　要：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%.

关 键 词：SrCO3∶Mn2+ 共沉淀法 发光 

分 类 号：O482.31[理学—固体物理]