Preparation and Fluorescence Property of Water-dispersible ZnSe:Co/ZnSe/ZnS Quantum Dots

4th International Conference on Applied Materials and Manufacturing Technology

材料科学;机械制造

Qiu, Chunhong^1 ; Huang, Fenghua^1 ; Huang, Tao^1 ; Fang, Xiu Ting^1 ; Huang, Meijing^1

College of Chemistry and Materials Science, Fujian Normal University, Fuzhou

350007, China^1

关键词: Fluorescence intensities;    Fluorescence properties;    Infrared spectrum;    Photoluminescence spectrum;    Superficial layers;    Ultraviolet-visible spectra;    Water dispersible;    X-ray power;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/423/1/012171/pdf
DOI  :  10.1088/1757-899X/423/1/012171

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, water-dispersible, L-cysteine-capped Co-doped ZnSe/ZnSe/ZnS core/shell/shell quantum dots are prepared via a simple epitaxial growth approach by depositing ZnS on the superficial layer of the Co-doped ZnSe/ZnSe core/shell QDs. The crystal structure as well as fluorescence performance of the as-prepared Co-doped core/shell/shell QDs have been testified through X-ray power diffraction, Infrared spectrum, Ultraviolet-visible spectrum and photoluminescence spectrum. The results exhibit that the Co-doped ZnSe/ZnSe/ZnS core/shell/shell quantum dots have a cubic sphalerite crystal and the size about 3.4nm. After coating ZnS shell with appropriate thickness around the Co-doped ZnSe/ZnSe core/shell QDs, the fluorescence intensity of Co-doped ZnSe/ZnSe/ZnS core/shell/shell QDs has been improved greatly.