title: Poly-4-vinylphenol and poly(melamine-co-formaldehyde)-based graphene passivation method for flexible, wearable and transparent electronics.
abstract: Next generation graphene-based electronics essentially need a dielectric layer with several requirements such as high flexibility, high transparency, and low process temperature. Here, we propose and investigate a flexible and transparent poly-4-vinylphenol and poly(melamine-co-formaldehyde) (PVP/PMF) insulating layer to achieve intrinsic graphene and an excellent gate dielectric layer at sub 200 °C. Chemical and electrical effects of PVP/PMF layer on graphene as well as its dielectric property are systematically investigated through various measurements by adjusting the ratio of PVP to PMF and annealing temperature. The optimized PVP/PMF insulating layer not only removes the native -OH functional groups which work as electron-withdrawing agents on graphene (Dirac point close to zero) but also shows an excellent dielectric property (low hysteresis voltage). Finally, a flexible, wearable, and transparent (95.8%) graphene transistor with Dirac point close to zero is demonstrated on polyethylene terephthalate (PET) substrate by exploiting PVP/PMF layer which can be scaled down to 20 nm.
authors.affiliation: Samsung-SKKU Graphene Center, Sungkyunkwan Advanced Institute of Nanotechnology (SAINT) and School of Electronics and Electrical Engineering, Sungkyunkwan University, Suwon 440-746, Korea. ghkim@skku.edu jhpark9@skku.edu.
authors.forename: In-yeal
authors.initials: IY
authors.lastname: Lee
authors.forename: Hyung-Youl
authors.initials: HY
authors.lastname: Park
authors.forename: Jin-hyung
authors.initials: JH
authors.lastname: Park
authors.forename: Gwangwe
authors.initials: G
authors.lastname: Yoo
authors.forename: Myung-Hoon
authors.initials: MH
authors.lastname: Lim
authors.forename: Junsung
authors.initials: J
authors.lastname: Park
authors.forename: Servin
authors.initials: S
authors.lastname: Rathi
authors.forename: Woo-Shik
authors.initials: WS
authors.lastname: Jung
authors.forename: Jeehwan
authors.initials: J
authors.lastname: Kim
authors.forename: Sang-Woo
authors.initials: SW
authors.lastname: Kim
authors.forename: Yonghan
authors.initials: Y
authors.lastname: Roh
authors.forename: Gil-Ho
authors.initials: GH
authors.lastname: Kim
authors.forename: Jin-Hong
authors.initials: JH
authors.lastname: Park
mesh_terms: D006108:Graphite / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry; D011093:Polyethylene Terephthalates / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D013696:Temperature; D014173:Transistors, Electronic; D014227:Triazines / Q000737:chemistry
chemical_list: D010636:Phenols; D011093:Polyethylene Terephthalates; D011108:Polymers; D014227:Triazines; C504353:melamine formaldehyde; D006108:Graphite; C030626:4-vinylphenol