摘要
采用固相法成功合成了具有β-Ca3(PO4)2结构的发光材料Ca8MgY(PO4)7∶Re3+(Re3+=Eu3+,Ce3+,Tb3+)。XRD、FT-IR及TG-DSC的测试结果表明,该发光材料的最佳烧结温度为1 200℃。PL测试结果表明,在252nm紫外光激发下,Ca8MgY(PO4)7∶Eu3+呈现Eu3+的特征发射,其中以位于612nm红光发射为主(5D0-7F2),Eu3+的最佳掺杂浓度为5.0%(摩尔分数)。在295nm紫外光激发下,Ce3+激活的Ca8MgY(PO4)7由峰值位于363nm的带状5d1-4f1发射为主,Ce3+的最佳掺杂浓度为1.0%(摩尔分数)。在228nm紫外光激发下,低掺杂浓度的Ca8MgY(PO4)7∶Tb3+以位于5D3-7FJ的蓝光发射为主,高掺杂浓度的Ca8MgY(PO4)7∶Tb3+以5D4-7FJ绿光发射为主,这是由于Tb3+的交叉弛豫造成的。Tb3+的最佳掺杂浓度为7.0%(摩尔分数)。
β-Ca3（PO4）2 structured Ca8MgY（PO4）7∶Re3＋（Re3＋=Eu3＋,Ce3＋,Tb3＋）has been prepared by solid state method.The results of XRD,FT-IR,and TG-DSC characterization indicated that the optimum synthesis temperature was at 1 200℃.PL characterization indicated that under 252nm ultraviolet irradiation,Ca8MgY（PO4）7∶Eu3＋ phosphor showed the characteristic emission of Eu3＋,dominated by the emission at 612nm,which was ascribed to 5 D0-7 F2 transition of Eu3＋,the optimum doping concentration of Eu3＋ was 5.0mol%.Under 295nm ultraviolet irradiation,Ca8MgY（PO4）7∶Ce3＋ phosphor showed a band emission with maximum at 363nm,which was originated from 5d1-4f1 transition of Ce3＋,the optimum doping concentration of Ce3＋ was 1.0mol%.Under the irradiation of ultraviolet at 228nm,the emission of Ca8MgY（PO4）7∶Tb3＋ was dominated by blue emission ascribed to 5D3-7FJat lower doping concentration,while at higher concentration,the emission was dominated by green emission ascribed to 5D4-7FJ.This phenomenon was due to the crossing-relaxation of Tb3＋.The optimum doping concentration of Tb3＋ was 7.0mol%.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2014年第12期12097-12101,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(21174025)
关键词
稀土
磷酸盐
发光
Rare earth
phosphate
luminescence
作者简介
曹晶晶（1979-），女，黑龙江五大连池人，在读博士，师承李斌教授，从事稀土发光材料研究。
通讯作者：李斌，E-mail：libinzh62@163．com
