Instability and large wire-wire contact resistance of silver nanowires (AgNWs) have seriously hindered their practical applications as electrodes in optoelectronic devices. Although various methods have been demonstrated to improve the stability and conductivity of the AgNWs, a simple and low-cost process, especially compatible to the flexible substrates for their applications in flexible devices, is still a challenge. Here, perfluorinated sulfonic acid (PFSA) polymer has been employed as a surface-passivation layer on the AgNWs through a simple surface coating. The PFSA passivation can simultaneously improve the conductivity, thermal stability and mechanical stability of the AgNWs. As a result, the PFSA-passivated AgNWs film maintains an almost constant conductivity under ambient condition after heating for 30 min at 250 °C or 10 days storage at room temperature, and 600 continuous bending cycles at a bending radius of 1 mm. The PFSA-passivated AgNWs have been applied to flexibly organic light emitting devices as their electrodes, and both mechanical stability and long-term operational stability have been improved.

银纳米线（AgNW）的不稳定性和较大的线-线接触电阻严重阻碍了它们在光电器件中作为电极的实际应用。尽管已经证明了各种方法可以改善AgNW的稳定性和导电性，但是简单，低成本的工艺（尤其是与柔性基板在柔性设备中的应用兼容）仍然是一个挑战。此处，全氟磺酸（PFSA）聚合物已通过简单的表面涂层用作AgNWs上的表面钝化层。PFSA钝化可以同时提高AgNWs的电导率，热稳定性和机械稳定性。结果是，PFSA钝化的AgNWs薄膜在250°C加热30分钟或在室温下储存10天后，在1mm弯曲半径下连续600次弯曲后，在环境条件下保持几乎恒定的导电率。PFSA钝化的AgNW被用作电极的柔性有机发光器件，机械稳定性和长期操作稳定性均得到改善。