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论文期刊

论文标题    The effect of core size on the fluorescence emission properties of CdTe@CdS core@shell quantum dots
作者    Jian Zhu, Si-Nan Wang, Jian-Jun Li, Jun-Wu Zhao ⁎
发表/完成日期    2018-03-21
期刊名称    Journal of Luminescence
期卷    199 (2018)
相关文章   
论文简介    In this work, the effect of core size on the fluorescence emission properties of CdTe@CdS core@shell quantum dots was investigated under the condition of different shell thickness and pH values. Both CdTe and CdTe@CdS core@shell QDs were synthesized in aqueous phase by a simple method, whose optical features were char- acterized by absorption and fluorescence spectra. High resolution transmission electron microscopy (HRTEM) and X-Ray Diffraction (XRD) were utilized to study the structure and composition of the as-prepared QDs. We can conclude that a smaller initial core exhibits a greater potential for optimizing both fluorescence intensity enhancement and red shift. What's more, there is an optimal shell thickness for the strongest fluorescence in- tensity while a thicker shell contributes to a larger fluorescence red shift. The optimal pH value is 10.5 for the fluorescence intensity enhancement of the core@shell QDs and a higher pH value is an advantage to expedite the growth rate of CdS shell.
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