水热法合成电子俘获材料SrS:Eu^(2+)、Sm^(3+)

Optical storage phosphor SrS:Eu^(2+),Sm^(3+) synthesized by hydrothermal method

采用水热法合成了电子俘获材料SrS:Eu2+、Sm3+。通过X射线衍射分析、扫描电子显微镜、能谱、光激励发光光谱和荧光衰减,对其微观结构与光谱性能进行了表征。研究表明所制得的SrS:Eu2+、Sm3+电子俘获材料为单相的面心立方结构,粒度均一,且粒径小。采用水热合成法能够有效降低样品中杂质含量,并可有效减缓样品衰减速率。光激励发光光谱(λex=980nm)表明Eu2+和Sm3+能够掺入SrS基质中,与高温固相法制备的材料相比,水热法制备的SrS:Eu2+、Sm3+有更高的发光强度。

Optical storage phosphor SrS：Eu2＋,Sm3＋ were prepared by hydrothermal method.The phase structure,microstructure and photo-stimulated luminescence spectra were characterized by XRD,SEM,EDAX,PSL,respectively.The results indicated that the SrS：Eu2＋,Sm3＋ were of pure phase,face-centred cubic structure and had small size with narrow distribution.It is found that the impurity content hydrothermal method can be effectively decreased and the speed of decay can be slow down.Photo-stimulation luminescence spectra（λex=980nm）showed that Eu2＋ and Sm3＋ could be incorporated into SrS effectively,and the luminescence intensity of the SrS：Eu2＋,Sm3＋ samples obtained by hydrothermal process were higher than the high temperature solid state method.