摘要
本文通过水热法合成不同浓度M^(2+)掺杂的NaYF_4:18%Yb^(3+),2%Er^(3+)上转换发光材料。系统的探讨了九种二价金属离子掺杂以及不同掺杂浓度对材料的上转换红光强度的影响。利用扫描电子显微镜(SEM)、X射线衍射分析(XRD)、荧光光谱等测量手段对样品进行了形貌、晶相、发光性质的表征。2%掺杂浓度下全部离子对上转换发光均稍有增强;5%掺杂浓度下,Sr、Ca对上转换荧光的增强效果最为显著,Ni、Zn、Co稍有增强,而Mg、Cu、Mn、Ba均降低了发光;10%掺杂浓度下,Mg、Ca对上转换荧光的增强效果最为显著,Zn稍有增强,而Ni、Sr、Cu、Mn、Ba、Co均降低了发光。荧光光谱结果表明碱土金属掺杂对发光的增强效果优于过渡金属掺杂,过渡金属对材料形貌的改善效果优于碱土金属。二价金属离子对红光的增强效果明显优于绿光。
Based on the hydrothermal synthesis of different concentration of M2^＋ doped NaYF4： Yb^3＋ 18%, 2% Er^3＋ conversion luminescence materials. System discussed nine kinds of divalent metal ions doped, and different doping concentration on the influence of materials on the conversion of red light intensity. The microparticles were characterized by scanning electron microscope （SEM）, X-ray diffraction analysis （XRD）, fluorescence spectrum. Intense yellow upconversion luminescence was observed under 980 nm excitation. 2 % doping concentrations all light slightly enhanced; 5% doping concentrations, St, Ca on conversion fluorescence enhancement effect is more significant, Ni, Co slightly enhanced, Zn, Mg, Cu, Mn, Ba reduces the light; 10 % doping concentrations, Mg, Ca on conversion fluorescence enhancement effect is more significant, Zn slightly enhanced, Ni, Sr, Cu, Mn, Ba, Co are reduced. Fluorescence spectrnm results showed that the alkaline earth metal doping enhancement effect of luminescence is superior to the transition metal doping, transition metal effect is better than that of alkaline earth metal on the improvement of the material appearance. Divalent metal ions enhance the red light obviously better than the effect of enhance the green light.
出处
《广东化工》
CAS
2017年第15期1-3,37,共4页
Guangdong Chemical Industry
关键词
水热法
上转换发光
NAYF4
二价金属离子
hydrothermal method
upconversion luminescence
NaYF4
divalent metal ion
