水溶性ZnS:Mn2量子点的合成及荧光性能研究

摘要

Water-soluble ZnS:Mn2+ quantum dots (QDs) emitting at 573 nm were synthesized with gas-liquid phase method. Effect of Mn2+ concentration on fluorescence intensity of ZnS:Mn2* QDs has been studied.lt was found that fluorescence intensity gradually increased with the increase of Mn2* concentration.When Mn2* doping concentration was at 1% ,the maximum emission intensity was achieved.If the Mn2* concentration continued to be increased,the fluorescence would decrease.ZnS:Mn2* QDs was characterized by transmission electron microscopy (TEM),X-ray diffraction (XRD),Infrared Spectroscopy (IR),UV-Vis absorption spectroscopy(UV-Vis),and photoluminescence (PL) emission spectroscopy.Results demonstrated that ZnS:Mn2+ showed strong yellow fluorescence.%采用气液两相法合成了在573 nm处发射荧光的水溶性ZnS∶Mn2+量子点.研究了Mn2+掺杂量(物质的量分数,下同)对ZnS∶Mn2+量子点荧光强度的影响,结果表明:随着Mn2+掺杂量的增加ZnS∶Mn2+量子点荧光强度随之增加；当Mn2+掺杂量达到1％时ZnS∶Mn2+子点荧光发射强度达到最大;继续增加Mn2+掺杂量ZnS∶Mn2+量子点荧光强度减弱.利用透射电镜(TEM)、X射线粉末衍射(XRD)、红外光谱(IR)、紫外-可见光谱(UV-Vis)和荧光发射光谱对ZnS∶Mn2+进行了表征,结果表明ZnS∶Mn2+量子点具有较强的黄色荧光.