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<p>Nanotechnology is a new expanding field of research including manipulating characteristics and nanoscale structures. Nanoparticles (NPs) have recently received a lot of attention in various applications such as biotechnological, fiber laser, and optical sensors. Here, we present a novel synthesis approach using reduced graphene oxide (rGO)/gold (Au) nanoparticles and embedding them into poly(methyl methacrylate) (PMMA) using the laser-induced forward transfer (LIFT) technique to form three samples of different thicknesses. These samples were measured by atomic force microscopy (AFM) to be 200&#xa0;nm, 230&#xa0;nm, and 240&#xa0;nm, respectively. The energy bandgap, ultraviolet–visible (UV–Vis) spectrum, scanning electron microscopy (SEM) image, and photodetector were used for the characterization of the samples. The highest specific quantum efficiency of 200-nm, 230-nm, and 240-nm thin-film samples was 141.5%, 151.86%, and 156%, at 900&#xa0;nm, while directivity was realized at 1.78 × 10<sup>12</sup> Jones, 1.85 × 10<sup>12</sup> Jones, and 1.86 × 10<sup>12</sup> Jones at 900&#xa0;nm, respectively. The LIFT films improved responsivity (<i>R</i><sub>λ</sub>), directivity (<i>D</i>*), quantum efficiency (<i>η</i>%), and current–voltage (I–V) measurements.</p>

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Effect of rGO/Au PMMA nanocomposite thin-film thickness on photodetector devices

  • 期刊论文

  • 发表日期：

    2025年9月8日

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  • Ehsan H. Sabbar,
  • Abdullah Khalid Ahmed,
  • Ahmed Shakir Al-Hiti

摘要

Nanotechnology is a new expanding field of research including manipulating characteristics and nanoscale structures. Nanoparticles (NPs) have recently received a lot of attention in various applications such as biotechnological, fiber laser, and optical sensors. Here, we present a novel synthesis approach using reduced graphene oxide (rGO)/gold (Au) nanoparticles and embedding them into poly(methyl methacrylate) (PMMA) using the laser-induced forward transfer (LIFT) technique to form three samples of different thicknesses. These samples were measured by atomic force microscopy (AFM) to be 200 nm, 230 nm, and 240 nm, respectively. The energy bandgap, ultraviolet–visible (UV–Vis) spectrum, scanning electron microscopy (SEM) image, and photodetector were used for the characterization of the samples. The highest specific quantum efficiency of 200-nm, 230-nm, and 240-nm thin-film samples was 141.5%, 151.86%, and 156%, at 900 nm, while directivity was realized at 1.78 × 1012 Jones, 1.85 × 1012 Jones, and 1.86 × 1012 Jones at 900 nm, respectively. The LIFT films improved responsivity (Rλ), directivity (D*), quantum efficiency (η%), and current–voltage (I–V) measurements.