Mn^(2+)掺杂水溶性ZnS量子点的制备及其光致发光性能  

Preparation and photoluminescence properties of Mn^(2+)-doped water-soluble ZnS quantum dots

作　　者：颜爱国[1] 薛继武[1] 冯起芹[1] 石亮[1] 高健[1] 

机构地区：[1]厦门理工学院材料科学与工程学院,福建厦门361024

出　　处：《功能材料》2014年第2期68-72,共5页Journal of Functional Materials

基　　金：中国博士后基金资助项目(20110491263);湖南省博士后基金资助项目(2011RS4056);湖南省自然科学基金资助项目(12JJ6049);湖南省教育厅平台基金资助项目(11K022);湖南工业大学自然科学基金资助项目(2011hzx01);湖南工业大学研究生创新基金资助项目(CX1206)

摘　　要：采用共沉淀法,在3-巯基丙酸(MPA)为表面修饰剂下,成功制备出Mn2+掺杂水溶性ZnS量子点。利用X射线衍射仪、透射电子显微镜、紫外-可见吸收光谱仪和荧光分光光度计等表征方法研究了Mn2+掺杂剂及掺杂量对ZnS量子点的晶体结构、形貌和发光性能等的影响。结果表明,所得产物为ZnS立方型闪锌矿结构,样品呈不规则球形,粒径主要集中在9.7nm左右;在320nm激发下,Mn2+掺杂ZnS量子点出现两个发射波峰,分别位于587和637nm处,其中587nm处的发射波峰为ZnS表面态缺陷发光,而637nm处的发射波峰则属于Mn2+∶4T1-6A1能级特征发光。同时,利用红外吸收光谱对Mn2+掺杂水溶性ZnS量子点的形成机理进行了初步探讨。Using 3-mercaptopropionic acid（MPA）as surface coated agent,Mn2＋-doped water-soluble quantum dots of ZnS were synthesized by co-precipitation method.The effects of Mn2＋ dopant and doping amount on mi-crostructure,morphology and photoluminescence properties of the as-products were researched by X-ray dif-fraction,transmission electron microscopy,UV-visible absorption spectrometer,and fluorescence spectropho-tometer.The results show that the products were irregular spherical cubic zinc blender ZnS with sizes around 9.7 nm.Photoluminescence spectra analysis show that Mn2＋-doped ZnS quantum dots appeared two emission peaks located at 587 and 637 nm which indicated ZnS surface emitting and Mn2＋∶4 T1-6 A1 level characteristic luminescence respectively.The synthesis mechanism of Mn2＋-doped ZnS quantum dots was studied by infrared spectroscopy.

关 键 词：Mn2+掺杂 水溶性 ZnS量子点 光致发光 

分 类 号：TB333[一般工业技术—材料科学与工程] TB34