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Chinese Optics  > 2020  >  13(6): 1257-1266.
TANG Yang. Tailoring the optical properties of Al-doped ZnO Nanorods by electrodeposition[J]. Chinese Optics, 2020, 13(6): 1257-1266. doi: 10.37188/CO.2020-0075
Citation: TANG Yang. Tailoring the optical properties of Al-doped ZnO Nanorods by electrodeposition[J]. Chinese Optics, 2020, 13(6): 1257-1266. doi: 10.37188/CO.2020-0075
shu

Tailoring the optical properties of Al-doped ZnO Nanorods by electrodeposition

  • 1.

    Center for Green Energy and Architecture, China Energy Investment Corporation, Beijing 102211, China

  • 2.

    National Institute of Clean-and-Low-Carbon Energy, Beijing 102211, China

Funds:  National Natural Science Foundation of China (No. 61404007); the Beijing Talents Fund (No. 2015000021223ZK38)
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  • Corresponding author: ytang118@163.com
  • Received Date: 27 Apr 2020
  • Rev Recd Date: 27 May 2020
    • Available Online: 10 Sep 2020
  • Publish Date: 01 Dec 2020
    Abstract
  • In order to achieve the implantation of the ZnO nanorod arrays in the nanostructured solar cells, it is necessary to tailor and control the nanorods’ morphology, optical and electrical properties. ZnO nanorods arrays were fabricated by electrodeposition. The physical properties such as the crystalline quality, diameter, density, distance, Al doping concentration, optical band gap energy, near band emission and stokes shift can be adjusted by using Al(NO3)3 and NH4NO3. The ZnO nanorods’ diameter can be adjusted from 28 nm to 102 nm. The nanorod arrays’ density can be reduced to 2.7×109 /cm2 by using NH4NO3, resulting in an increase in the distance between nanorods to 164 nm. The Al/Zn weight ratio was increased to 2.92% by using NH4NO3, indicating that NH4NO3 can boost Al doping in ZnO nanorods. The ZnO nanorods’ optical band gap energy can be tailored from 3.36 eV to 3.55 eV by using Al(NO3)3 and NH4NO3 and the near band edge emission can also be adjusted. The use of Al(NO3)3 led to the increase of the Stokes shift to 200 meV, but it can be greatly reduced to 26 meV as a result of the NH4NO3. The use of Al(NO3)3 and NH4NO3 resulted in the fabrication of high-quality ZnO nanorod arrays with effectively tailored morphology and optical properties.

     

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