摘要
报道了氯硅酸镁钙Ｃａ８Ｍｇ（ＳｉＯ４）４Ｃｌ２及氯硅酸锌钙Ｃａ８Ｚｎ（ＳｉＯ４）４Ｃｌ２中Ｃｅ３＋的发光特性，研究并分析了Ｃｅ３＋在这两种材料中的激发光谱、发射光谱及荧光衰减特性。在ＵＶ辐射激发下，Ｃｅ３＋发射出强的蓝紫光。室温下Ｃｅ３＋在两种材料中的荧光寿命分别为６１ｎｓ和４４ｎｓ。
In this paper,the luminescence properties of Ce 3+ doped Ca 8M(SiO 4) 4Cl 2(M=Mg,Zn) are reported for the first time.Ca 8Mg(SiO 4) 4Cl 2(abbreviated to CMSC)and Ca 8Zn(SiO 4) 4Cl 2(abbreviated to CZSC) are two kinds of new luminescence hosts and they have the same crystal structure——face centred cubic lattice with space group of Fd3m or Fd 3.Ce 3+ doped CMSC and CZSC are efficient purplish blue phosphors and their emission spectra show a broad band under the excitation of UV light.The emission and excitation spectra of Ce 3+ indicate that there are two Ce 3+ emission centres in two kinds of hosts.The fluorescence decay curves of CMSC∶ Ce 3+ and CZSC∶Ce 3+ are measured and the fluorescence lifetimes of Ce 3+ in CMSC and CZSC are 61ns and 44 ns respectively due to the allowable 5d→4f electrostatic dipole transition at room temperature.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1997年第4期494-498,共5页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金
关键词
铈离子
碱土氯硅酸盐
发光
荧光寿命
硅酸盐
cerium ions,alkalineearth chlorosilicate,luminescence,fluorescence lifetime
