Multilayer ordered silver nanowire network films by self-driven climbing for large-area flexible optoelectronic devices

Abstract

Silver nanowire (AgNW) networks hold great promises as next-generation flexible transparent electrodes (FTEs) for high-performance flexible optoelectronic devices. However, achieving large-area flexible AgNW network electrodes with low sheet resistance, high optical transmittance, and a smooth surface remains a grand challenge. Here, we report a straightforward and cost-effective roll-to-roll method that includes interface assembly/wetting-induced climbing transfer, nanowelding, and washing processess to fabricate flexible ordered layered AgNW electrodes with high network uniformity. By manipulating the stacking number of the interfacially assembled AgNW monolayer, we can precisely tailor and balance the transparency and the conductivity of the electrodes, achieving an exceptional Figure of Merit (FoM) value of 862. Moreover, the ordered layered structure enhances surface smoothness, compared with randomly arranged structures. To highlight the potential of these ordered layered AgNW network electrodes in flexible optoelectronic devices, we successfully employ them as highly sensitive strain sensors, large-area flexible touch screens, and flexible smart windows. Overall, this work represents a substantial advance toward high-performance FTEs over large areas, opening up exciting opportunities for the development of advanced optoelectronic devices.