Advances in materials Research

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Influence of Co incorporation on morphological, structural, and optical properties of ZnO nanorods synthesized by chemical bath deposition

  • Iwan Sugihartono (Program Studi Fisika, FMIPA Universitas Negeri Jakarta) ;
  • Novan Purwanto (Program Studi Fisika, FMIPA Universitas Negeri Jakarta) ;
  • Desy Mekarsari (Program Studi Fisika, FMIPA Universitas Negeri Jakarta) ;
  • Isnaeni (National Research and Innovation Agency, KST BJ Habibie) ;
  • Markus Diantoro (Department of Physics, State University of Malang) ;
  • Riser Fahdiran (Program Studi Fisika, FMIPA Universitas Negeri Jakarta) ;
  • Yoga Divayana (Department of Electrical Engineering, Udayana University, Kampus Bukit Jimbaran) ;
  • Anggara Budi Susila (Program Studi Fisika, FMIPA Universitas Negeri Jakarta)
  • Received : 2022.03.20
  • Accepted : 2023.03.14
  • Published : 2023.09.25
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Abstract

We have studied the structural and optical properties of the non-doped and Co 0.08 at.%, Co 0.02 at.%, and Co 0.11 at.% doped ZnO nanorods (NRs) synthesized using the simple low-temperature chemical bath deposition (CBD) method at 95℃ for 2 hours. The scanning electron microscope (SEM) images confirmed the morphology of the ZnO NRs are affected by Co incorporation. As observed, the Co 0.08 at.% doped ZnO NRs have a larger dimension with an average diameter of 153.4 nm. According to the International Centre for Diffraction Data (ICDD) number #00-036-1451, the x-ray diffraction (XRD) pattern of non-doped and Co-doped ZnO NRs with the preferred orientation of ZnO NRs in the (002) plane possess polycrystalline hexagonal wurtzite structure with the space group P63mc. Optical absorbance indicates the Co 0.08 at.% doped ZnO NRs have stronger and blueshift bandgap energy (3.104 ev). The room temperature photoluminescence (PL) spectra of ZnO NRs exhibited excitonicrelates ultraviolet (UV) and defect-related green band (GB) emissions. By calculating the UV/GB intensity, the Co 0.08 at.% is the proper atomic percentage to have fewer intrinsic defects. We predict that Co-doped ZnO NRs induce a blueshift of near band edge (NBE) emission due to the Burstein-Moss effect. Meanwhile, the redshift of NBE emission is attributed to the modification of the lattice dimensions and exchange energy.

Keywords

Acknowledgement

I would like to thank the support from Universitas Negeri Jakarta and the Direktorat Sumber Daya, Direktorat Jenderal Pendidikan Tinggi, Kementerian Pendidikan dan Kebudayaan, Riset dan Teknologi through Hibah Penelitian Dasar Unggulan Perguruan Tinggi No. 1/E4.1/DSD/LPPM/2021 is gratefully acknowledged.

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