Abstract
Cu–Ag core-shell nanowire (Cu@Ag NW) films were fabricated using vacuum filtration and transfer method (VFT) on glass substrates coated with polymer thin films, as transparent conductive films (TCFs). Even when the polyvinylpyrrolidone (PVP) K120 polymer as the optimal binder, which allowed strong bonding between the NWs and the substrates, was selected, the NWs obtained from the VFT are peeled off easily from the substrate under spin coating of solutions due to insufficient contact area between NWs and substrates. Thus, the NWs were pressed against the substrates in the presence of capillary immersion force, which was generated during the processes of ethanol dropping and evaporation on the NW films. This approach resulted in a sufficient contact area between the NWs and the polymer surfaces, and consequently the NWs strongly adhered to substrates and maintained their performances as TCFs after spin coating. The adhesive and durable NW films with good performances (transmittance and sheet resistance values of 89.4% and 61.3 Ω/sq) are suitable TCFs for the fabrication of various optoelectronic devices by spin coating.
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