摘要
采用高温固相法,在掺杂硫的情况下制备了不同激活剂浓度的Sr3Al2O6:Eu2+,Dy3+红色长余辉发光材料,用X射线粉末衍射表征样品的晶体结构,用激发光谱、发射光谱和余辉衰减曲线对样品的发光性能进行了表征。研究表明,样品主晶相为Sr3Al2O6,并有少量杂相SrS,样品的基质为混合基质。Eu2+的含量没有引起样品的晶体结构和激发峰的变化,但对样品的发射峰和余辉性能影响显著。在Sr3Al2O6和SrS两种基质并存时,Eu2+优先进入SrS基质中,随着Eu2+含量的减少,样品发射波长发生"红移"。在Eu2+含量为0.010时,样品初始亮度最高,余辉性能也最好。
Long afterglow phosphor Sr3Al2O6：Eu2＋,Dy3＋ doped with sulfur was prepared by high-temperature solid state reaction method.The crystal structure of the samples was characterized by X-ray diffraction.The luminescent properties of the samples were characterized by excitation spectra,emission spectra and afterglow light curves.The results showed that the main crystal phase of samples was Sr3Al2O6,and there was a small amount of impurity phase which was SrS.The sample′s matrix was mixed-substrate.Eu2＋ content had no obvious effect on the crystal structure and excitation peak of samples,but the influence of Eu2＋ content on emission peaks and afterglow properties of samples was obvious.When the matrix of Sr3Al2O6 and SrS coexisted,Eu2＋ entered into the SrS matrix preferentially.With the decrease of Eu2＋ content,the red shift of emission wavelength for samples was drawn.When Eu2＋ content was 0.010,the initial brightness and afterglow properties were the best.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2010年第3期293-296,共4页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金(50843029)资助
