Abstract
Transparent conductive layer (TCL) were fabricated from flexible silver nanowires (AgNWs) using charge-assisted coating (CAC) and were subsequently applied in a transparent flexible heater (TFH). The CAC process is a simple and inexpensive process of immersing a substrate in an aqueous solution of charged species and assembling them on the substrate via electrostatic attraction. The AgNWs were synthesized by the polyol method, functionalized with 3-mercaptopropionic acid, and assembled on a polyethylene terephthalate substrate. The optical transmittance of the TCL was controlled by regulating the AgNW solution concentration. The fabricated films were post-processed by calendering. The calendering post-treatment decreased the sheet resistance and increased the structural stability of the AgNW TCL. When the concentration of the AgNW solution was 50 µg/mL, the fabricated AgNW layer exhibited the highest figure of merit possessing a sheet resistance of 8.2 Ω/sq and a transmittance of 82.7%. With a protective layer of polyurethane, AgNW TFH showed a heating temperature of 110°C at bias voltage of 5 V. The dehumidification performance of the TFH was also successfully demonstrated.
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