Nanoscale Electrical Investigation of Transparent Conductive Electrodes Based on Silver Nanowire Network

• Published in: Advanced materials interfaces Vol. 9; no. 18
• Main Authors: Pham, Sy Hieu, Ferri, Anthony, Da Costa, Antonio, Mohan, M. M. Saj, Tran, Van Dang, Nguyen, Duy Cuong, Viville, Pascal, Lazzaroni, Roberto, Desfeux, Rachel, Leclère, Philippe
• Format: Journal Article
• Language: English
• Published: Weinheim John Wiley & Sons, Inc 01.06.2022; Wiley
• Subjects: annealing treatment; Atomic force microscopy; Chemical Sciences; conductive atomic force microscopy (c‐AFM); Electrical properties; Electrodes; Electronic devices; Figure of merit; Indium tin oxides; Material chemistry; Nanowires; Optical properties; Percolation; Silver; silver nanowires; Thin films; transparent electrodes
• ISSN: 2196-7350; 2196-7350
• DOI: 10.1002/admi.202200019

Presently, metallic nanowires (NWs) are the most promising materials to fabricate flexible transparent electrodes as an alternative to indium tin oxide. Here, the high performance of transparent conductive electrodes (TCEs) based on silver nanowires (AgNWs) percolation networks is reported. With optimized experimental conditions for the deposition, the AgNWs result in low sheet resistance of 10 Ω sq−1 combined with a high optical transmittance of 92.6% at λ = 550 nm. This leads to a valuable figure of merit as compared to other TCEs. In this study, the nanoscale electrical properties of the AgNWs are measured via conductive atomic force microscopy to characterize the percolation network. The electrical resistivity value calculated for a single AgNW is found to be about 12.35 µΩ cm, while a nanoscale conductivity map over an AgNW network bridging two electrodes has revealed high levels of current within the network over a distance of more than 1000 µm. The favorable determined conductivity results along with the high optical properties of the AgNWs network strongly suggest that thin‐film electrodes based on AgNWs will be a potential approach for future flexible electronic devices. Here, the high performances of transparent conductive electrodes based on silver nanowire percolation networks are reported. With optimized experimental conditions, the result shows low sheet resistance of 10 Ω sq−1 combined with a high optical transmittance of 92.6% at 550 nm. The nanoscale electrical properties of the nanowires are measured via conductive atomic force microscopy to characterize the percolation network.