Preparation of ZnS/AgNW network for stabilization of flexible transparent conductive films by hot vapor deposition method

Ag NWs have received much attention from researchers due to their excellent optoelectronic properties and mechanical flexibility. However, the nano-size effect of Ag NW leads to their poor stability in harsh environments and easy oxidation, which makes it challenging to meet the application requirements of flexible electronic devices. Covering the surface of Ag NW with a protective layer coating is one of the most effective methods to address the stability of Ag NW. In this study, a ZnS protective layer is covered on the surface of Ag NW by utilizing a low-cost, simple, thickness-controllable, and densely packed hot vapor deposition film-forming method. The prepared ZnS/Ag NW network has low sheet resistance (9.7Ω/sq.) and high transmittance (86.6% at 550 nm). It maintains good oxidation resistance and thermal stability in various harsh environments. The ultrasonic test and adhesion test show good adhesion between the ZnS/Ag NW network and the PET substrate, and excellent mechanical stability and flexibility are demonstrated by bending test and fatigue test.