Volume 12 Issue 4
Aug.  2019
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Chinese Optics  > 2019  >  12(4): 872-879.
ZHAO Hai-xia, FANG Xuan, WANG Yan-bin, FANG Dan, LI Yong-feng, WANG Deng-kui, WANG Xiao-hua, CHU Xue-ying, ZHANG Xiao-dong, WEI Zhi-peng. Formation of interface defects of ZnO/ZnS core-shell nanowires and its optical properties investigations[J]. Chinese Optics, 2019, 12(4): 872-879. doi: 10.3788/CO.20191204.0872
Citation: ZHAO Hai-xia, FANG Xuan, WANG Yan-bin, FANG Dan, LI Yong-feng, WANG Deng-kui, WANG Xiao-hua, CHU Xue-ying, ZHANG Xiao-dong, WEI Zhi-peng. Formation of interface defects of ZnO/ZnS core-shell nanowires and its optical properties investigations[J]. Chinese Optics, 2019, 12(4): 872-879. doi: 10.3788/CO.20191204.0872
shu

Formation of interface defects of ZnO/ZnS core-shell nanowires and its optical properties investigations

  • 1.

    State Key Laboratory of High Power Semiconductor Laser, Changchun University of Science and Technology, Changchun 130022, China

  • 2.

    College of Physics, Jilin University, Changchun 130012, China

  • 3.

    Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO), Chinese Academy of Sciences, Suzhou 215123, China

  • 4.

    Key Laboratory for Photonic and Electric Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin 150025, China

Funds:

National Natural Science Foundation of China 11674038

Developing Project of Science and Technology of Jilin Province 20160520117JH

Developing Project of Science and Technology of Jilin Province 20170520118JH

Developing Project of Science and Technology of Jilin Province 20160204074GX

Developing Project of Science and Technology of Jilin Province 20160203015GX

Innovation Foundation of Changchun University of Science and Technology XJJLG-2016-11

Innovation Foundation of Changchun University of Science and Technology XJJLG-2016-14

Open Foundation of Key Laboratory of Chinese Academy of Sciences Nano Device and Application 18JG01

More Information
  • Corresponding author: FANG Xuan, E-mail:fangxuan110@126.com
  • Received Date: 27 Nov 2018
  • Rev Recd Date: 09 Jan 2019
  • Publish Date: 01 Aug 2019
    Abstract
  • ZnO/ZnS core-shell nanostructures have great application prospects in optoelectronic area due to their excellent optoelectronic properties. They rely mainly on the binding effect of carriers at the interface of the core-shell structure to more effectively control carrier generation, transmission and recombination processing. In order to discuss the interfacial state of ZnO/ZnS core-shell structure and its corresponding optical properties, ZnO/ZnS core-shell nanowires with different amounts of sulfur powder vulcanization were grown and then characterized using scanning electron microscopy(SEM), transmission electron microscopy(TEM), Photoluminescence spectroscopy(PL). Analysis and discussion were conducted for the structure and optical properties of the ZnO/ZnS core-shell nanowire interface after sulfurization with different amounts of sulfur powder. By analyzing the morphology of the ZnO/ZnS core-shell structure, it was found that ZnS successfully coated ZnO nanowires and with the increase of vulcanization degree, the ZnO core structure was destroyed and defects were introduced at the core-shell interface, resulting in forming ZnO/ZnS core-shell structure with different crystal qualities. The structure affects the optical properties of ZnO/ZnS core-shell nanowires. The results show that when few defects appear at the interface of the ZnO/ZnS core shell, they have a binding effect on the generation and transport of carriers, thus inhibiting the non-radiative composite effect and improving the optical properties of the material. When the interface defects increase, the formed defect energy level reduces the optical properties of the material.

     

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