Abstract
Graphene conductive pastes are poised to apply in making flexible electronics via a screen-printing way because of its excellent electrical and mechanical properties. In this paper, a new formulation of a pristine graphene-based paste was presented consisting of the conductive filler of graphene, a mixed solvent of terpineol, dipropylene glycol methyl ether, cyclohexanone, and the auxiliaries of ethylcellulose, Span-85 and 1,4-butyrolactone. The paste containing 20 wt% of the graphene was prepared and showed excellent dispersibility and stability. The screen-printed patterns on a polyimide substrate achieved a high conductivity of 9 × 104 S/m and had excellent mechanical flexibility.
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