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

• Published in: Opto-Electronic Advances Vol. 4; no. 12; p. 200101
• Main Authors: Zhao, Yuan-Yuan, Ren, Xue-Liang, Zheng, Mei-Ling, Jin, Feng, Liu, Jie, Dong, Xian-Zi, Zhao, Zhen-Sheng, Duan, Xuan-Ming
• Format: Journal Article
• Language: English
• Published: School of Future Technologies,University of Chinese Academy of Sciences,Yanqihu Campus,Beijing 101407,China 01.01.2021; Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications,Institute of Photonics Technology,Jinan University,Guangzhou 511443,China%Laboratory of Organic NanoPhotonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China%Laboratory of Organic NanoPhotonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China; Institue of Optics and Electronics, Chinese Academy of Sciences
• Subjects: conductivity; direct laser writing; laser nanosoldering; photothermal effect; silver nanoparticles; silver nanowires; silver nanowires; direct laser writing; silver nanoparticles; conductivity; photothermal effect; laser nanosoldering
• ISSN: 2096-4579
• DOI: 10.29026/oea.2021.200101

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.