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在有机相体系中利用ZnSe前驱体纳米晶制备过程中的富Se环境,以引入Cd2+的方式在相对温和的环境下通过控制Cd2+离子的加入量及调节反应时间,成功制备了ZnSe/CdSe核-壳复合结构纳米晶.利用X射线衍射(XRD)、透射电镜(TEM)、紫外-可见吸收光谱(UV-vis)和荧光光谱(FL)对其结构形貌以及光学性质进行表征和分析的结果表明,CdSe以外延生长的方式包覆在ZnSe纳米晶表面从而形成具有良好结晶性的核-壳复合结构,其荧光发射始终保持良好单色性,同时实现了在500～620nm可见光范围内的连续可调.
In the organic phase system, ZnSe precursor nanocrystal was used to prepare the Se-rich environment. CdSe + CdSe core was successfully prepared by controlling the amount of Cd2 + ions and adjusting the reaction time in a relatively mild environment by introducing Cd2 + Shell composite nanocrystals.The results of X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis and fluorescence spectroscopy (FL) were used to characterize and analyze the morphology and optical properties The results show that CdSe epitaxially grows on the surface of ZnSe nanocrystal to form a well-crystallized core-shell composite structure. Its fluorescence emission always maintains a good monochromaticity, and at the same time, it achieves continuous in the visible range of 500-620 nm Adjustable.