The modification effect of the doping of Yb3+ ions, as an auxiliary activator, onto the luminescent properties of SrAl2O4:Eu2+, Dy3+ phosphor was studied for the first time. The phosphorescent nanoparticles were prepared by the combustion method. The experimental results indicate that the ...
发光分析表明Dy3+的掺杂没有改变SrAl2O4Eu2+的光致发光光谱和发光中心。热释光谱对比分析结果显示Eu2+的掺杂在SrAl2O4的禁带中引入了两个深度不同的陷阱能级;Dy3+的掺杂并不改变原来陷阱能级的深度,却能够显著地增加原来浅陷阱能级的密度,从而改善了SrAl2O4Eu2+的余辉特性。不同等待时间的热释光谱曲线显示...
Large attention is dedicated to the preparation of compounds with thermo- (TM), photo- (PL) and mechano-luminescent (ML) properties [36–38] with orthorhombic structure of the type SrR2O4:Mn+ (where R=Y, Sm, Eu, Er, Yb… and Mn+=Eu2+, Gd3+, Yb3+, Dy3+, Sm3+, Tb3+…) [...
The composites are phosphate glass (75NaPO3-25CaF2 and 90NaPO3-10NaF (in mol%)) with embedded phosphors: CaWO4: Yb3+, Tm3+ crystals with blue upconversion and SrAl2O4:Eu2+,Dy3+ with green persistent luminescence. Green persistent luminescence above 0.3 mcd/m2 can be seen for ~ 30 ...
根据Dorenbos能级模型的推论,利用掺杂Yb3+和Er3+对典型的长余辉材料SrAl2O4∶Eu2+,Dy3+(简称SAO∶ED)的发光特性(发光强度和余辉时间)进行调制。在发光特性分析中,发展并使用了一种简便易行的解析模型,而不是常用的多项e指数衰减函数的经验模型。研究发现,正如Dorenbos所预言的,Yb3+掺杂确实能够提高SAO∶ED的...
Lanthanide ions are usually considered as biocompatible materials, especially Eu3+, Gd3+, Sm3+, Yb3+ and Y3+ ions which were found to have a relatively low toxicity [[10], [11], [12], [13]]. Many works focus on rare earth (RE) ion doped luminescence materials because of the peculia...