摘要
采用水热法合成Sr^(2+)共掺杂YPO_4:Eu^(3+)发光材料,采用X射线衍射(XRD)和X射线荧光光谱对合成产物的物相结构和光学性能进行表征,对Sr^(2+)共掺杂浓度及反应体系p H值对合成样品的物相结构及发光性能的影响进行分析。结果表明,少量Sr^(2+)(≤15at%)共掺杂YPO_4:1at%Eu^(3+)均为纯相四方磷钇矿结构晶体,过量Sr^(2+)(≥20at%)共掺杂出现Sr_4P_2O_9杂相;p H值为6的反应体系可获得高结晶度的单一相Sr^(2+)、Eu^(3+)共掺杂YPO_4样品。X射线荧光光谱分析结果表明,采用水热法合成的YPO_4:1at%Eu^(3+),xat%Sr^(2+)样品可被396 nm的紫外光激发而发射出强烈的Eu^(3+)特征橙红色光,一定量的Sr^(2+)共掺杂能提高YPO_4:1 at%Eu^(3+)样品的发光性能,过量(>10at%)的Sr^(2+)掺杂导致Eu^(3+)荧光猝灭。YPO_4:1at%Eu^(3+),10at%Sr^(2+)样品在396 nm紫外光激发下位于620 nm处的发射峰相对强度较YPO_4:1at%Eu^(3+)样品提高了72.6%。
Sr^2＋co-doped YPO4：Eu^3＋phosphors were successfully synthesized by hydrothermal method.The structure and optical properties of the synthesized samples were investigated by XRD and AFS.The influences of Sr^2＋co-doping concentration and precursor solution p H on the phase structure and luminescence properties of the samples were investigated.The results show that the Sr^2＋co-doped YPO4：1at%Eu^3＋samples with Sr^2＋doping content no more than 10at%are single-phase crystals with tetragonal xenotime structure,Sr4P2O9impurity phase can be observed in the samples with amount of Sr^2＋.The pure phase and high crystallinity Sr^2＋,Eu^3＋co-doped YPO4samples can be obtained at p H=6condition.The results of excitation spectra and emission spectra show that the YPO4：1at%Eu^3＋,xat%Sr^2＋samples can be excited by 396 nm UV light and emit the characteristic red-orange light of Eu^3＋.An appropriate amount of Sr^2＋co-doped YPO4：1at%Eu^3＋samples display enhanced luminescence,and amount of Sr^2＋（more than 10at%）co-doping in the YPO4：1at%Eu^3＋samples can quench the Eu^3＋emission.The intensity of emission peak located at 620 nm of YPO4：1at%Eu^3＋,10at%Sr^2＋sample is stronger about 72.6%than that of YPO4：1at%Eu^3＋sample.
作者
刘欢
陈健
付兵
杨锦瑜
LIU Huan;CHEN Jian;FU Bing;YANG Jinyu(School of Chemistry and Materials Science, GuizhouNormalUniversity , Guiyang 550001 , China;Key Lab for Functional Materials Chemistry of GuizhouProvince, Guiyang 550001, China)
出处
《有色金属工程》
CAS
CSCD
北大核心
2018年第2期54-58,共5页
Nonferrous Metals Engineering
基金
国家自然科学基金项目(213610007)
贵州省高层次人才科研特助经费项目(TZJY-2011-40)
贵州省国际科技合作计划项目(黔科合外G字[2013]7015号)
