Zhou Jianan, Li Dongmei, Sang Wenbin, Fan Zengyi, Wang Hui. Preparation of Core-Shell Structure CdS/ZnS Nanoparticles and Their Optical Properties[J]. Chinese Journal of Chemical Physics , 2004, 17(5): 637-640. doi: 10.1088/1674-0068/17/5/637-640
Citation: Zhou Jianan, Li Dongmei, Sang Wenbin, Fan Zengyi, Wang Hui. Preparation of Core-Shell Structure CdS/ZnS Nanoparticles and Their Optical Properties[J]. Chinese Journal of Chemical Physics , 2004, 17(5): 637-640. doi: 10.1088/1674-0068/17/5/637-640

Preparation of Core-Shell Structure CdS/ZnS Nanoparticles and Their Optical Properties

doi: 10.1088/1674-0068/17/5/637-640
Funds:  Project supported by the Reward Plan in Teaching and Scientific Research of Colleges and Universitys Outstanding Young Teacher of Education Ministry of China.
  • Received Date: 2003-07-08
  • CdS and CdS/ZnS core-shell structure nano particles were synthesized in micro emulsion, and characterized by X-ray diffraction(XRD), transmission electron microscopy (TEM), UV absorption spectra and PL. The average diameter of CdS was about 3.3 nm, and CdS/ZnS core-shell structure was confirmed by XRD and UV. Considering the optical properties of CdS/ZnS core-shell structure nanoparticles which have different ZnS shell thickness, the UV absorption edge of CdS/ZnS becomes as lightred-shift with the thickness of ZnS layer increasing, and the absorption of shortwave band is strongly enhanced at the same time. The PL spectra indicate that ZnS shell layer can greatly eliminate surface defects of CdS nanoparticles and make its band-edge directed recombination increased, and the luminous efficiency of CdS is improved greatly when it has appropriate shell thickness.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Preparation of Core-Shell Structure CdS/ZnS Nanoparticles and Their Optical Properties

doi: 10.1088/1674-0068/17/5/637-640
Funds:  Project supported by the Reward Plan in Teaching and Scientific Research of Colleges and Universitys Outstanding Young Teacher of Education Ministry of China.

Abstract: CdS and CdS/ZnS core-shell structure nano particles were synthesized in micro emulsion, and characterized by X-ray diffraction(XRD), transmission electron microscopy (TEM), UV absorption spectra and PL. The average diameter of CdS was about 3.3 nm, and CdS/ZnS core-shell structure was confirmed by XRD and UV. Considering the optical properties of CdS/ZnS core-shell structure nanoparticles which have different ZnS shell thickness, the UV absorption edge of CdS/ZnS becomes as lightred-shift with the thickness of ZnS layer increasing, and the absorption of shortwave band is strongly enhanced at the same time. The PL spectra indicate that ZnS shell layer can greatly eliminate surface defects of CdS nanoparticles and make its band-edge directed recombination increased, and the luminous efficiency of CdS is improved greatly when it has appropriate shell thickness.

Zhou Jianan, Li Dongmei, Sang Wenbin, Fan Zengyi, Wang Hui. Preparation of Core-Shell Structure CdS/ZnS Nanoparticles and Their Optical Properties[J]. Chinese Journal of Chemical Physics , 2004, 17(5): 637-640. doi: 10.1088/1674-0068/17/5/637-640
Citation: Zhou Jianan, Li Dongmei, Sang Wenbin, Fan Zengyi, Wang Hui. Preparation of Core-Shell Structure CdS/ZnS Nanoparticles and Their Optical Properties[J]. Chinese Journal of Chemical Physics , 2004, 17(5): 637-640. doi: 10.1088/1674-0068/17/5/637-640

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