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中文摘要：
采用液-固-溶液（LSS）法制备了ZnSe∶Fe纳米晶,利用X射线粉末衍射（XRD）技术、透射电子显微镜（TEM）、光致发光（PL）谱、紫外-可见吸收（UV-Vis）光谱以及傅里叶变换红外（FT-IR）光谱对所制备样品的结构和光学性质进行了表征,研究了掺杂Fe离子对ZnSe纳米晶光学性质的影响规律。实验结果表明所制备的ZnSe∶Fe纳米晶为立方闪锌矿结构,粒径在3.5～4.5nm之间,与纯ZnSe相比,ZnSe∶Fe纳米晶表现出明显的荧光增强现象,随掺杂Fe离子的浓度的不同,其荧光峰位和强度均有变化。UV-Vis吸收谱表明ZnSe∶Fe纳米晶在410nm附近出现吸收峰,与ZnSe体材料相比有明显蓝移,为量子尺寸效应所致。利用Tauc关系计算了ZnSe∶Fe纳米晶的能隙,为3.4eV。
英文摘要：
ZnSe∶Fe nanocrystals（NCs） were synthesized by a simple liquid-solid-solution method.The crystalline and optical properties of ZnSe∶Fe NCs were characterized by X-ray diffraction,transmission electron microscopy,photoluminescence spectroscopy,UV-visible spectrometer and FT-IR spectrometer,respectively.The influence of doping on the optical properties of ZnSe∶Fe NCs was investigated.It was found that the ZnSe∶Fe NCs are highly crystalline and show zinc blende structure with an average particle size of about 3.5-4.5nm.Compared to the pure ZnSe NCs,the ZnSe∶Fe NCs exhibited significantly enhanced luminescence properties.The emission band and the intensity of PL emission were all changed when the doping concentration altered.The absorption peak of sample is observed at around 410nm which is blue shifted from the corresponding bulk value,it may be due to quantum size effect.The optical band gap of ZnSe∶Fe was calculated using the Tauc relation,it was 3.4eV.
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