Coating composition including functionalized graphene oxide, method for forming stacked structure using the same and method for manufacturing display device using the same

A coating composition comprising:

• a graphene oxide;
• a water-soluble polymer;
• and
• a solvent, wherein
• the water-soluble polymer includes at least one selected from the group consisting of PSS (poly(styrene sulfonate)), PEI (polyetherimide), PDDA (poly(diallyldimethylammonium chloride)), PMA (poly(methacrylic acid)), PVS (poly(vinyl sulfate)), poly(amic acid), and PAH (poly(allylamine hydrochloride)),
• a weight ratio of the water-soluble polymer to the graphene oxide is 0.01 to 1,
• at least one of a carboxyl group and an epoxide group of the graphene oxide is functionalized by an amine,
• the amine has an activation energy to an epoxide group of the graphene oxide of −3 kcal/mol to 8 kcal/mol,
• a zeta potential of the coating composition is +30 mV to +60 mV, and
• a solution conductivity of the coating composition is 0.001 mS/cm to 0.05 mS/cm.