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<p>Ag nanoparticles (Ag-NPs) of particle size around 25&#xa0;nm were added to InSb alloy aiming at enhancing its thermoelectric performance. Structural properties of the synthesized samples were examined using x-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscope (SEM). The highest recorded electrical conductivity was 70.85 (Ω&#xa0;m)<sup>−1</sup> around 473&#xa0;K for InSb alloy. The largest Seebeck coefficient (<i>S</i>) was observed for the highest Ag-NPs-doped sample which exhibited <i>S</i> of 366.6&#xa0;μV/K. When temperature rises, the most doped sample with Ag nanoparticles exhibited the highest power factor of 0.97&#xa0;μW/mK<sup>2</sup>, while the highest power factor at room temperature was obtained at 2.34&#xa0;μW/mK<sup>2</sup> for the parent InSb sample. Because of the serious decrease in the thermal conductivity by Ag-NPs addition, the thermoelectric figure of merit (ZT) of the InSb-Ag-NPs alloys was remarkably enhanced. A maximum ZT of 3.5 × 10<sup>−4</sup> was recorded at 473&#xa0;K for the most Ag-NPs-composited sample.</p>

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Impact of Ag Nanoparticle Doping on the Structural, Electrical, and Thermoelectric Characteristics of Alloys Based on Crystalline InSb

  • 期刊论文

  • 发表日期：

    2025年5月13日

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  • Zainab M. H. El-Qahtani,
  • A. K. Diab,
  • H. F. Khalil,
  • Norah Alsairy,
  • M. A. El-Hadek,
  • E. M. Elsehly,
  • A. M. Adam

摘要

Ag nanoparticles (Ag-NPs) of particle size around 25 nm were added to InSb alloy aiming at enhancing its thermoelectric performance. Structural properties of the synthesized samples were examined using x-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscope (SEM). The highest recorded electrical conductivity was 70.85 (Ω m)−1 around 473 K for InSb alloy. The largest Seebeck coefficient (S) was observed for the highest Ag-NPs-doped sample which exhibited S of 366.6 μV/K. When temperature rises, the most doped sample with Ag nanoparticles exhibited the highest power factor of 0.97 μW/mK2, while the highest power factor at room temperature was obtained at 2.34 μW/mK2 for the parent InSb sample. Because of the serious decrease in the thermal conductivity by Ag-NPs addition, the thermoelectric figure of merit (ZT) of the InSb-Ag-NPs alloys was remarkably enhanced. A maximum ZT of 3.5 × 10−4 was recorded at 473 K for the most Ag-NPs-composited sample.