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<p>This work reports on the fabrication of gold nanoparticles (Au NPs)/zirconium oxide (ZrO<sub>2</sub>)/porous silicon photodetector for multi-wavelength detection, particularly for UV detection. This multilayer photodetector is fabricated using more than one method. Au NPs are synthesized by pulsed laser ablation in liquid (PLAL), followed by drop casting on ZrO<sub>2</sub> thin films prepared with (600, 800, and 1000&#xa0;mJ) laser energy through pulsed-laser deposition (PLD) on a porous silicon substrate. For the first time, significant properties of this fabricated photodetector are enhanced, including gain, sensitivity, detectivity, responsivity, and quantum efficiency. X-ray diffraction results revealed that the Au/ZrO<sub>2</sub>/PSi thin films have a crystalline structure with a face-centered cubic (FCC) phase for Au NPs, while ZrO<sub>2</sub> exhibit a dominant monoclinic phase. The uniform particle distribution and nanoscale size range (10–15&#xa0;nm) for this composite are demonstrated by FE-SEM. High-resolution TEM shows the spherical shape of Au NPs. Furthermore, the J-V characteristic test revealed that photocurrent increased directly with light intensity. The focus here is on UV detection. The photodetector responsivity at an applied bias of 3&#xa0;V increased from 0.15 to 0.17 A/W at 350&#xa0;nm with an increase in laser energy from (600 to 1000&#xa0;mJ), while detectivity reached its highest value of 2.5 × 10<sup>11</sup>&#xa0;cm Hz<sup>0.5</sup>/W for the 600-mJ film. Quantum efficiency demonstrated better results, reaching up to 60.7% for 1000&#xa0;mJ. The results of the Au/ZrO<sub>2</sub> photodiode indicate that the performance of the UV photodiode is enhanced with increased laser pulse energy.</p>

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Effective Performance of Gold–Zirconia Photodetector Produced via Laser Energy Control Deposited on Porous Silicon

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Ruwaida T. Shbeeb,
  • Falah A.-H. Mutlak

摘要

This work reports on the fabrication of gold nanoparticles (Au NPs)/zirconium oxide (ZrO2)/porous silicon photodetector for multi-wavelength detection, particularly for UV detection. This multilayer photodetector is fabricated using more than one method. Au NPs are synthesized by pulsed laser ablation in liquid (PLAL), followed by drop casting on ZrO2 thin films prepared with (600, 800, and 1000 mJ) laser energy through pulsed-laser deposition (PLD) on a porous silicon substrate. For the first time, significant properties of this fabricated photodetector are enhanced, including gain, sensitivity, detectivity, responsivity, and quantum efficiency. X-ray diffraction results revealed that the Au/ZrO2/PSi thin films have a crystalline structure with a face-centered cubic (FCC) phase for Au NPs, while ZrO2 exhibit a dominant monoclinic phase. The uniform particle distribution and nanoscale size range (10–15 nm) for this composite are demonstrated by FE-SEM. High-resolution TEM shows the spherical shape of Au NPs. Furthermore, the J-V characteristic test revealed that photocurrent increased directly with light intensity. The focus here is on UV detection. The photodetector responsivity at an applied bias of 3 V increased from 0.15 to 0.17 A/W at 350 nm with an increase in laser energy from (600 to 1000 mJ), while detectivity reached its highest value of 2.5 × 1011 cm Hz0.5/W for the 600-mJ film. Quantum efficiency demonstrated better results, reaching up to 60.7% for 1000 mJ. The results of the Au/ZrO2 photodiode indicate that the performance of the UV photodiode is enhanced with increased laser pulse energy.