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<p>Silver micro/nanomaterials have garnered significant attention due to their unique architecture and tunable properties, which are critical for applications in electronics, catalysis, and optical systems. This study investigates the synthesis, morphology, and performance of silver nanomaterials produced via chemical reduction methods. By systematically varying reaction parameters such as the reducing agent quantity and silver ion concentration, hollow spherical and dendritic silver nanostructures were successfully synthesized. The optimal morphology was achieved with a reducing agent-to-silver nitrate ratio of 2:1. A detailed examination of the formation mechanism revealed that dendritic structures arise from nanoparticle aggregation and attachment processes. Furthermore, the blending of silver powders with distinct morphologies was shown to enhance the performance of conductive silver pastes. A paste with a 7:3 ratio of hollow spherical to dendritic silver powders exhibited superior properties, including a dense silver film layer, sheet resistance of 2.46 mΩ/□, and maximum conductivity. These findings demonstrate that tailoring the morphology and composition of silver nanomaterials can significantly improve their functional performance. Meanwhile, the solar cells fabricated with silver paste d exhibited a V<sub>OC</sub> of 614 mV, J<sub>SC</sub> of 33.6 mA/cm<sup>2</sup>, P<sub>MAX</sub> of 2.31 W, FF of 71.3%, and an E<sub>ff</sub> of 15.4% , which provided a valuable insights for solar cell applications.</p>

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Preparation of Conductive Silver Paste with Mixed Nanostructured Silver Powders

  • 期刊论文

  • 发表日期：

    2025年3月3日

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  • Keke Wang,
  • Xiaokai Li,
  • Haihan Fan,
  • Shixian Xiong,
  • Baixiong Liu,
  • Cijun Shuai

摘要

Silver micro/nanomaterials have garnered significant attention due to their unique architecture and tunable properties, which are critical for applications in electronics, catalysis, and optical systems. This study investigates the synthesis, morphology, and performance of silver nanomaterials produced via chemical reduction methods. By systematically varying reaction parameters such as the reducing agent quantity and silver ion concentration, hollow spherical and dendritic silver nanostructures were successfully synthesized. The optimal morphology was achieved with a reducing agent-to-silver nitrate ratio of 2:1. A detailed examination of the formation mechanism revealed that dendritic structures arise from nanoparticle aggregation and attachment processes. Furthermore, the blending of silver powders with distinct morphologies was shown to enhance the performance of conductive silver pastes. A paste with a 7:3 ratio of hollow spherical to dendritic silver powders exhibited superior properties, including a dense silver film layer, sheet resistance of 2.46 mΩ/□, and maximum conductivity. These findings demonstrate that tailoring the morphology and composition of silver nanomaterials can significantly improve their functional performance. Meanwhile, the solar cells fabricated with silver paste d exhibited a VOC of 614 mV, JSC of 33.6 mA/cm2, PMAX of 2.31 W, FF of 71.3%, and an Eff of 15.4% , which provided a valuable insights for solar cell applications.