US 12,225,809 B2
Coating composition including functionalized graphene oxide, method for forming stacked structure using the same and method for manufacturing display device using the same
Hee Kyun Shin, Incheon (KR); Dong Kyun Seo, Seoul (KR); Jun Ho Sim, Hwaseong-si (KR); Woo Jin Cho, Yongin-si (KR); Byung Hoon Kang, Hwaseong-si (KR); Seung Jun Moon, Cheonan-si (KR); Sun Chan Park, Hwaseong-si (KR); Hee Won Seo, Hwaseong-si (KR); Ji Eun Cho, Hwaseong-si (KR); and Kyu Soon Shin, Hwaseong-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR); and DONGJIN SEMICHEM CO., LTD., Hwaseong-si (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR); and DONGJIN SEMICHEM CO., LTD., Hwaseong-si (KR)
Filed on Sep. 23, 2020, as Appl. No. 17/029,855.
Claims priority of application No. 10-2019-0123941 (KR), filed on Oct. 7, 2019.
Prior Publication US 2021/0104672 A1, Apr. 8, 2021
Int. Cl. H10K 71/80 (2023.01); C09D 1/00 (2006.01); C09D 7/63 (2018.01); H10K 50/844 (2023.01); H10K 71/00 (2023.01); H10K 77/10 (2023.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01)
CPC H10K 71/80 (2023.02) [C09D 1/00 (2013.01); C09D 7/63 (2018.01); H10K 50/8445 (2023.02); H10K 71/00 (2023.02); H10K 77/111 (2023.02); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); H10K 50/844 (2023.02)] 17 Claims
OG exemplary drawing
 
1. 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.