水溶性ZnS:Mn^(2+)量子点的合成及荧光性能研究

Synthesis of water-soluble ZnS:Mn^(2+) quantum dots and photoluminescence thereof

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+量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。

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.It 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.