Preparation of CdSe/ZnSe Core-shell Nanocrystal in One-step Reaction |
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Authors: | FEI Xiao-fang SHAN Gui-ye KONG Xiang-gui WANG Xin ZENG Qing-hui ZHANG You-lin |
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Institution: | 1. Key Laboratory of Excited State Physics Process, Changchun Institute of Optic, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, P. R. China;
2. College of Life Sciences, Jilin University, Changchun 130021, P. R. China;
3. Center for Advanced Optoelectronic Functional Material Research, Northeast Normal University, Changchun 130024, P. R. China |
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Abstract: | High-quality Zn-doped CdSe core-shell nanocrystals were successfully prepared by incorporating a stoichiometric amount of Zn precursor into the CdSe reaction system, in which the Se precursor was excess and an Se-rich surface was formed. By injecting different amounts of Zn precursor, the core-shell nanocrystals demonstrated by the emission spectra were formed. The obtained Zn-doped CdSe nanocrystals exhibit a photoluminescence efficiency from 30% to 85%, which is comparable to those for the reported CdSe/ZnS, CdSe/CdS in the literature. In particular, a shell ZnSe layer with different thicknesses of ZnSe can be formed in this experiment by only changing the amount of Zn precursor added, which is simple and effective. |
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Keywords: | CdSe/ZnSe Core-shell one-step Photoluminescence |
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