Fabrication of defrost films using graphenes grown by chemical vapor deposition

We demonstrate the fabrication of defrost films using graphene-based transparent conductive films (TCF). The graphene was catalytically synthesized on Ni thin film using chemical vapor deposition method with methane source and transferred onto glass or flexible polymeric substrates. The fabricated graphene-based TCF showed moderate transmittance over 85% in visible range and low sheet resistance of 750 Ω/sq. with high reliability. We measured heating response of the films as a result of constant or cyclic voltage application to use as defrost films. The maximum temperature of the films increased up to 80 °C under the application of 40 V and the films showed high heating stability for 24 h. Finally, we confirmed that the frost formed on the surface of the graphene-based TCF can be clearly removed within 30 s under the application of 30 V. The results show high feasibility of the graphene-based TCF as defrost films in many areas.