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<p>In the present work, pure and erbium (Er) doped ZnO NPs are synthesized using the co-precipitation method with varied doping concentration of Er (0.25 wt% to 1.5 wt%). The primary goal of this study is to enhance the optical properties of ZnO nanoparticles (NPs) which can be used in various potential applications. The optical properties of synthesized materials were investigated using ultraviolet-visible (UV-vis) diffuse reflectance spectra (DRS), fluorescence spectroscopy (FL), and photoluminescence spectroscopy (PL). The scanning electron microscopy (SEM) and X-ray diffraction spectra (XRD) were used to determine the morphological and structural properties. Furthermore, the Fourier transform infrared (FTIR) spectra show the presence of vibrational peaks corresponding to Zn-O and Er-O which confirmed the doping of Er within ZnO. The DRS spectra show the reduction of optical bandgap after doping with Er in the ZnO matrix. The Pure and the RE doped ZnO NPs show luminescence in the visible region due to the presence of defects which can be assured by FL and PL spectroscopy. The PL spectra of Er-doped ZnO show the sharp luminescence centers at 555&#xa0;nm, 638&#xa0;nm, and 664&#xa0;nm which correspond to the green and red light emissions in the visible region.</p>

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Defect-engineered visible luminescence and bandgap tuning in erbium-doped ZnO nanoparticles

  • 期刊论文

  • 发表日期：

    2026年7月27日

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  • Lokesh Kumar Jangir,
  • Milankumar D. Mayavanshi,
  • Sanjay Kumar,
  • Manoj Kumar,
  • Kamakshi Pandey,
  • Kamlendra Awasthi

摘要

In the present work, pure and erbium (Er) doped ZnO NPs are synthesized using the co-precipitation method with varied doping concentration of Er (0.25 wt% to 1.5 wt%). The primary goal of this study is to enhance the optical properties of ZnO nanoparticles (NPs) which can be used in various potential applications. The optical properties of synthesized materials were investigated using ultraviolet-visible (UV-vis) diffuse reflectance spectra (DRS), fluorescence spectroscopy (FL), and photoluminescence spectroscopy (PL). The scanning electron microscopy (SEM) and X-ray diffraction spectra (XRD) were used to determine the morphological and structural properties. Furthermore, the Fourier transform infrared (FTIR) spectra show the presence of vibrational peaks corresponding to Zn-O and Er-O which confirmed the doping of Er within ZnO. The DRS spectra show the reduction of optical bandgap after doping with Er in the ZnO matrix. The Pure and the RE doped ZnO NPs show luminescence in the visible region due to the presence of defects which can be assured by FL and PL spectroscopy. The PL spectra of Er-doped ZnO show the sharp luminescence centers at 555 nm, 638 nm, and 664 nm which correspond to the green and red light emissions in the visible region.