Flexible transparent conductive film based on silver nanowires and reduced graphene oxide

Abstract

Silver nanowires (AgNWs) with diameter of 90—150 nm and length of 20—50 μm were successfully synthesized by a polyol process. Graphene oxide (GO) was prepared by Hummers method, and was reduced with strong hydrazine hydrate at room temperature. The flexible transparent conductive films (TCFs) were fabricated using the mixed cellulose eater (MCE) as matrix and AgNWs and reduced graphene oxide (rGO) as conductive fillers by the improved vacuum filtration process. Then, the optical, electrical and mechanical properties of the AgNWs-rGO films were investigated. The results show that for the AgNWs-rGO film produced with the deposition densities of AgNWs and rGO as 110 mg·m^-2 and 55 mg·m^-2, the optical transmission at 550 nm is 88.4% with R_s around 891 Ω·sq^-1, whereas the optical transmission for the AgNWs-rGO film with deposition densities of AgNWs and rGO of 385 mg·m^-2 and 55 mg·m^-2 is 79.0% at 550 nm with R_s around 9.6 Ω·sq^-1. There is little overt increase in R_s of the AgNWS-rGO film after tape tests for 200 times. The bending test results indicate that the change in R_s of AgNWs-MCE film is less than 2% even after 200 cycles of compressive or tensile bending. The excellent mechanical properties of the AgNWs-rGO film can be attributed to the burying of AgNWs and rGO at the surface of MCE.

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