Study Of Flexible Transparent Conductive Film Based On Silver Nanowires

Recently,ITO has been widely used in electronics such as touch screen,solar cell,and organic light emitting diodes.However,ITO has many drawbacks such as brittleness and the growing cost of indium metal,which cause restrictions in its applications.Nowadays,several materials including metal nanowires,carbon nanotube and graphene have been proposed to replace ITO.In this study,silver nanowires(Ag NWs)flexible transparent conductive film(FTCT),graphene@silver nanowires(G@Ag NWs)FTCT and graphene/silver nanowires(G/Ag NWs)FTCT were prepared.And their structure,morphology,sheet resistance,transmittance and other properties were characterized.First of all,Ag NWs with high aspect ratio were synthesized by polyol method.Several major preparation conditions were explored and Ag NWs with a length of 80 μm and a diameter of 80 nm on average were obtained.Based on this result,Ag NWs FTCFs were prepared by spin coating method.Then the influence of welding method on the electrical performances was explored.Secondly,the composite of Ag NWs and graphene(G)was studied.Ag NWs coated with amorphous carbon(C@Ag NWs)were mass produced by the hydrothermal method.After carbonization,Ag NWs coated with graphitic carbon(G@Ag NWs)were obtained.Then G@Ag NWs FTCF was prepared by spin coating method.Its sheet resistance was 143.7 Ω / sq and transmittance(at 550 nm)reaches 81 %.Finally,the reduced graphene oxide/silver nanowires(rGO/Ag NWs)FTCF was prepared.With the help of sodium dodecyl benzene sulfonate(SDBS),a stable mixture solution of GO and Ag NW was prepared,and the rGO/Ag NWs FTCT was obtained simply by filtration.The stable test conformed that the uniform coating of rGO on Ag NWs prevented exposure of Ag NWs from water and air and played the role of conduction bridge for Ag NWs.The resistance of such a film was measured at 15.33 Ω / sq with the transmittance is 80.1 %.And its resistance was further reduced to 10.99 Ω / sq after welding,which is close to that of ITO.This method shows a potential to serve as a cheap,fast,large-scale preparation for advanced films.And it provides a pathway to mass fabricate flexible transparent conductive film with high electrical performances and facilitate the industrial application of Ag NWs.