Abstract
A highly flexible, transparent, and conductive polyimide (PI) hybrid film with good thermal stability was fabricated by embedding reduced graphene oxide (rGO) coated silver nanowire (AgNW) into 4,4'-(hexa fluoroisopropylidene)diphthalic anhydride(6FDA)/2,2'-bis(trifluoromethyl)benzidine (TFDB) poly(amic acid) using a spray coating method, followed by thermal imidization. The PI/AgNW/rGO conductive film exhibited good thermal stability up to 553 °C, low sheet resistance (37 Ω/sq), high optical transparency (81%), and high hydrophobic surface (water contact angle, 89°). The rGO protected the surface of AgNW, which is weak to oxidation in air condition, and thus effectively reduced the surface resistance of the PI hybrid film. The hybrid film may offer a good potential for application as flexible transparent conducting electrodes.
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