摘要
利用柠檬酸溶胶凝胶法合成了绿色发光材料γ-LiAlO2:Tb3+。用X射线粉末衍射(XRD)、扫描电子显微镜(SEM)及荧光光谱(PL)等测试手段,研究了助熔剂H3BO3对γ-LiAlO2:Tb3+的物相、形貌和发光性能的影响。结果表明,样品仍为四方晶系,在238nm的紫外激发下,跃迁发射峰位于489nm,542nm,548nm,584nm和620nm,分别对应于Tb3+的5 D4→7F6,5 D4→7F5,5 D4→7F4和5 D4→7F3的能级跃迁。硼酸的加入,有利于样品荧光和形貌的改善,其最佳掺杂摩尔浓度为1.5%。
γ-LiAlO2：Tb3＋ green phosphor material was prepared by sol-gel method using LiNO3, AI（NO3 ）3 · 9H2 O, Tb（NO3 ）3 · 6H2O and citric acid as raw materials. The influences of H3 BO3 using as a fluxing agent on structure, morphology and photoluminescence properties of γ-LiAlO2：Tb3＋ phosphor were investigated by X-ray diffraction （XRD） analysis,scanning electron microscopy（SEM） and fluorescence spectrophotometer, respectively. The experimental results show that the structure of the phosphor is still tetragonal. Excited by 238 nm UV light, the emission peaks locate at 489 nm,542 nm,548 nm,584 nm and 620 nm,corresponding to the ^5D4→^7F6,^5D4→^7F5,^5D4→^7F4 and ^5D4→^7F3 typical transitions of Tb3＋ , respectively. The luminescence characteristics and morphology can be improved via H3 BO3 doped. The optimal Ha BO3 doping concentration is 1.5 % in mole.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2014年第1期53-57,共5页
Journal of Wuhan University of Technology
基金
国防基础研究项目(B312011001)
西南科技大学博士基金(08zx0103)
关键词
硼酸
γ-LiAlO2
助熔剂
发光性能
boric acid
γ-LiAlO2
fluxing agent
luminescence characteristics
