Ca_8Mg（SiO_4）_4Cl_2中Ce^（3＋）的光谱与晶体学格位  

Spectra and Crystallographic Sites of Ce￣(3+) in Ca_8Mg(SiO_4)_4Cl_2

作　　者：林海[1] 刘行仁[1] 马龙[1] 刘大涛[1] 

机构地区：[1]中国科学院长春物理研究所,吉林大学分子生物学系

出　　处：《吉林大学自然科学学报》1996年第4期75-78,共4页Acta Scientiarum Naturalium Universitatis Jilinensis

基　　金：国家自然科学基金中国科学院长春物理研究所激发态物理开放实验室资助课题

摘　　要：合成了新型蓝色光致发光材料Ｃａ８Ｍｇ（ＳｉＯ４）４Ｃｌ２：Ｃｅ（３＋），并对其进行了光谱测试．分析了Ｃｅ（３＋）在Ｃａ８Ｍｇ（ＳｉＯ４）４Ｃｌ２晶体中应占据的晶体学格位．测试结果表明，在紫外光激发下，Ｃａ８Ｍｇ（ＳｉＯ４）４Ｃｌ２：Ｃｅ（３＋）的发射光谱为一峰位在４１０ｎｍ～４２５ｎｍ之间的宽谱带，经分析确认作为发光中心的Ｃｅ（３＋）占据Ｃａ８Ｍｇ（ＳｉＯ４）４Ｃｌ２晶体中多面体八配位的Ｃａ（Ⅱ）格位．A new kind of blue luminescence materials Ca,Mg(SiO.).CI,: Ce3+ has been synthesized.The spectra of the new phosphor have been determined. On the basis of analysing the excitation and emission spectra, the crystallographic sites of Ce3+ in Ca,Mg(SiO.).CI, crystal is discussed. The results of the mesurement indicate that the emssion spectra of Ca,Mg(SiO.).CI,: Ce3+ are single broad bands under the excitation of UV light. All these peak-positions are in 410 'm￣425 urn.We analysed the crystal structure of Ca,Mg(SiO.).CI,, obtaining the conclusion that the luminescence centers Ce3+ occupy the sites of Ca(I )-- a polyhedral site surrounded by six oxygen and two chlorine atoms in Ca,Mg(SiO.).CI,.

关 键 词：氯硅酸镁钙 晶体学格位 铈离子 光致发光材料 

分 类 号：O734.3[理学—晶体学]