Effect of Preparation and Reduction on Specific Surface Electrical Resistance of Thin Films Obtained from Graphene Oxide Dispersion

Resumo

The effect of reducing agents and reduction conditions on the electrophysical characteristics of thin transparent conductive films obtained from an alcohol dispersion of graphene oxide (GO) by spin coating at different rotation speeds of the substrate (from 5000 to 7000 rpm) is investigated. Surface morphology of the films, light transmittance, structure of chemical bonds in the films, specific surface electrical resistance, and thickness of the films are determined. Films of multilayer reduced graphene oxide (RGO) with a thickness of 10 to 60 nm and a specific surface electrical resistance of 7.7 to 26.77 kΩ/cm² and light transmission of 74 to 88%, which can be widely used in photovoltaics and sensor electronics, are obtained. It is established that the treatment of the samples under study in saturated ammonia vapor most effectively contributes to the reduction of the specific surface electrical resistance of the films.