在La_2Na_2Sr_6(PO_4)_6Br_2基质中Tb^(3+)的发光及Ce^(3+)对Tb^(3+)的敏化  

Luminescence of Tb_(3+) and Its Sensitization by Ce_(3+) in Matrix La_2Na_2Sr_6(PO_4)_6Br_2

作　　者：宋家庆[1] 黄竹坡[1] 

机构地区：[1]北京大学化学系,北京100871

出　　处：《高等学校化学学报》1992年第8期1022-1025,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：用高温固相反应法合成了发光材料、研究了Tb^(3+)在La_2Na_2Sr_6(PO_4)_6Br_2基质中的光致发光性质及Ce^(3+)对Tb^(3+)的敏化作用.在254nm紫外光激发下,Tb^(3+)的发光较弱,但Ce^(3+)对Tb^(3+)有强的敏化作用,其能量传递机埋是偶极-偶极相互作用引起的共振能量传递,计算了传递效率。The phosphor samples were prepared by high temperature solid state reactions.Pho-toluminescence of Tb3+ ions and its sensitization by Ce3+ ions were studied systematically.Luminescence of Tb3+ excited by UV 254 nm is weak,but can be enhanced by the sensitization of Ce3+ ions.The mechanism of energy transfer from Ce3+ to Tb3+ is of resonance nature caused by dipole-dipole interaction.Efficiency of such energy transfer was calculated.

关 键 词：敏化发光 稀土 碱土金属 卤碱酸盐 

分 类 号：TQ422[化学工程]