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<p>In the present study, tulsi extract mediated hydrothermal method is utilized for the synthesis of Covellite CuS nanoparticles. To optimize the synthesised nanoparticles for their application in Blue Light Emitting Diode (BLEDs), the effect of reaction time on their structural and optical properties, was studied at 100&#xa0;°C for 8&#xa0;h, 12&#xa0;h, and 16&#xa0;h. Here, a biomolecule eugenol present in tulsi extract acted as a good reducing, stabilizing, and catalytic agent. The diffraction and morphological studies were conducted using X-Ray Diffraction and Field Emission Scanning Electron Microscopy analysis respectively. The particle size decreases with the increase in reaction time and the structural parameters matched well with the covellite CuS hexagonal phase prepared at 12&#xa0;h reaction time. Ultraviolet-visible absorption studies reveal that the bandgap of nanoparticles was found in the range of 3.64–3.8&#xa0;eV. The Photoluminescence spectroscopy and CIE chromaticity plot reveal that the sample synthesized at 12&#xa0;h has a low recombination rate and emits light in the blue region which suggests that it can be utilized in devices like blue LEDs and lamps. Statement of relevance. In the present study, the green synthesis approach is adopted by using Tulsi extract as a solvent for synthesizing Covellite CuS nanoparticles via the hydrothermal route. The optical properties of synthesized sample reveal that the sample can be a potential n-type material for Blue LEDs.</p>

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Green Synthesis of Covellite CuS Nanoparticles for BLEDs

  • 期刊论文

  • 发表日期：

    2025年12月19日

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  • Yukti Gupta,
  • Neena Jaggi

摘要

In the present study, tulsi extract mediated hydrothermal method is utilized for the synthesis of Covellite CuS nanoparticles. To optimize the synthesised nanoparticles for their application in Blue Light Emitting Diode (BLEDs), the effect of reaction time on their structural and optical properties, was studied at 100 °C for 8 h, 12 h, and 16 h. Here, a biomolecule eugenol present in tulsi extract acted as a good reducing, stabilizing, and catalytic agent. The diffraction and morphological studies were conducted using X-Ray Diffraction and Field Emission Scanning Electron Microscopy analysis respectively. The particle size decreases with the increase in reaction time and the structural parameters matched well with the covellite CuS hexagonal phase prepared at 12 h reaction time. Ultraviolet-visible absorption studies reveal that the bandgap of nanoparticles was found in the range of 3.64–3.8 eV. The Photoluminescence spectroscopy and CIE chromaticity plot reveal that the sample synthesized at 12 h has a low recombination rate and emits light in the blue region which suggests that it can be utilized in devices like blue LEDs and lamps. Statement of relevance. In the present study, the green synthesis approach is adopted by using Tulsi extract as a solvent for synthesizing Covellite CuS nanoparticles via the hydrothermal route. The optical properties of synthesized sample reveal that the sample can be a potential n-type material for Blue LEDs.