Conductive graphene coatings synthesized from graphenide solutions

International audienceA simple preparation procedure to produce conductive graphene coatings from graphenide solution under inert atmosphere is achieved. The obtained graphene films exhibit reasonably low surface resistivity of 5 kohms/Square at 60% transmittance at 550 nm that can be largely improved by thermal treatment. XPS, Raman spectroscopy and X-ray diffraction measurements demonstrate that annealing vastly improves the quality of the graphene films. Heat treatment at low temperature (120 °C) demonstrates a 60% resistivity decrease, an impressive and promising improvement for films deposited onto flexible polymer substrate