Mn：CdTe量子点的水相合成及荧光性质

Synthesis of Mn-doped CdTe Quantum Dots in Water and the Fluorescence Properties

采用水相合成法合成了Mn2＋掺杂CdTe量子点（Mn：CdTe d-dots）.通过荧光光谱（PL）分析、原子力显微镜（AFM）和X线粉末衍射（XRD）分析、电子能谱（EDS）分析对产物进行了表征.研究了反应时间、温度、Mn2＋掺杂量、pH值及巯基丙酸（MPA）与镉离子的比例对掺杂量子点发光性能的影响.结果表明：反应时间、温度、pH、MPA与Cd2＋的比例对量子点的粒径大小、粒径的分布和粒子的生长速度均有影响;Mn2＋的掺杂主要影响量子点的发光性能及热稳定性.本实验通过在CdTe量子点中掺杂Mn2＋,进一步改良CdTe的发光性能及热稳定性,扩大了量子点的应用范围.

Mn-doped CdTe quantum dots（Mn：CdTe d-dots） were synthesized in the water.The products were characterized by photoluminescence spectra（PL）,atomic force microscope（AFM）,X ray powder diffraction（XRD） and energy dispersive spectrometer（EDS）.The conditions,such as the reaction time,temperature,Mn2＋ doped quantity,pH and the molar ratio of MPA and Cd2＋,were studied.Experimental results showed that： the reaction time,temperature,pH,the molar ratio of MPA and Cd2＋ had influenced on the particle size of doped quantum dots,size distribution and the rate of growth;the quantity of Mn2＋ had great effect on the property of fluorescence and the thermal stability.In experiment,quantum dots of CdTe were doped by Mn2＋,it further improved the property of fluorescence and the thermal stability of the CdTe QDs and expanded the appilcation range of the quantum dots.