Plasmon-enhanced nanosoldering of silver nanoparticles for high-conductive nanowires electrodes

• 作者: Yuan-Yuan Zhao Xue-Liang Ren Mei-Ling Zheng Feng Jin Jie Liu Xian-Zi Dong Zhen-Sheng Zhao Xuan-Ming Duan
• 来源期刊: 光电进展（英文版）
• 年，卷（期）: 2021,（12）
• 所属期刊栏目: Original Article
• 页码范围: 25-33
• 页数: 9页
• 语种: 英文
• DOI: 10.29026/oea.2021.200101

摘要

The silver nanowires (Ag NWs) electrodes, which consist of incompact Ag nanoparticles (NPs) formed by multi-photon photoreduction, usually have poor conductivities. An effective strategy for enhancing conductivity of the Ag NWs elec-trodes is plasmon-enhanced nanosoldering (PLNS) by laser irradiation. Here, plasmon-enhanced photothermal effect is used to locally solder Ag NPs and then aggregates of these NPs grow into large irregular particles in PLNS process. Fi-nite element method (FEM) simulations indicate that the soldering process is triggered by localized surface plasmon-in-duced electric field enhancement at "hot-spots". The effectiveness of PLNS for enhancing conductivity depends on laser power density and irradiation time. By optimizing the conditions of PLNS, the electrical conductivity of Ag NWs is signific-antly enhanced and the conductivity σs is increased to 2.45×107 S/m, which is about 39％ of the bulk Ag. This PLNS of Ag NWs provides an efficient and cost-effective technique to rapidly produce large-area metal nanowire electrodes and capacitors with high conductivity, excellent uniformity, and good flexibility.