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<p>The one-dimensional (1D) ZnO-NRs/ZrO<sub>2</sub> core-shell nanostructures were prepared by coating thin ZrO<sub>2</sub> layers on the surface of 1D-ZnO-NRs using a novel pulsed laser deposition (PLD) technique at different temperatures and varying oxygen pressure during the deposition process. Morphological and structural characterizations confirm the uniform deposition of 1D-ZnO-NRs by the deposited ZrO₂ shell. It is found that the photoluminescence (PL) of ZnO-NRs/ZrO<sub>2</sub> core/shell nanostructures is strictly dependent on their optical band gaps, and the PL intensity at ultraviolet (UV) emission progressively enhanced in comparison to bare 1D-ZnO-NRs. This significant enhancement of the UV emission mechanism can be attributed to the effective carrier confinement effect, defects, and surface passivation of the type-I core shell nanostructure, which could be very useful for future optoelectronic device-based applications.</p>

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Tuning of optical band gap and photoluminescence behaviours of 1D-ZnO decorated with ZrO2 (ZnO-NRs/ZrO2 core-shell) nanostructured materials by pulse laser deposition technique

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月18日

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  • Megha Megha,
  • Abhinav Mahapatra,
  • G. Maity,
  • Prashant Kumar Mishra,
  • Sekhar Chandra Ray,
  • Susanta Sinha Roy

摘要

The one-dimensional (1D) ZnO-NRs/ZrO2 core-shell nanostructures were prepared by coating thin ZrO2 layers on the surface of 1D-ZnO-NRs using a novel pulsed laser deposition (PLD) technique at different temperatures and varying oxygen pressure during the deposition process. Morphological and structural characterizations confirm the uniform deposition of 1D-ZnO-NRs by the deposited ZrO₂ shell. It is found that the photoluminescence (PL) of ZnO-NRs/ZrO2 core/shell nanostructures is strictly dependent on their optical band gaps, and the PL intensity at ultraviolet (UV) emission progressively enhanced in comparison to bare 1D-ZnO-NRs. This significant enhancement of the UV emission mechanism can be attributed to the effective carrier confinement effect, defects, and surface passivation of the type-I core shell nanostructure, which could be very useful for future optoelectronic device-based applications.