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Poly-4-vinylphenol and Poly(melamine-Co-Formaldehyde)-Based Graphene Passivation Method for Flexible, Wearable and Transparent Electronics

Poly-4-vinylphenol and Poly(melamine-Co-Formaldehyde)-Based Graphene Passivation Method for Flexible, Wearable and Transparent Electronics

In-yeal Lee, Hyung-Youl Park, Jin-hyung Park, Gwangwe Yoo, Myung-Hoon Lim, Junsung Park, Servin Rathi, Woo-Shik Jung, Jeehwan Kim, Sang-Woo Kim, Yonghan Roh, Gil-Ho Kim, Jin-Hong Park

Nanoscale. 2014 Apr 7;6(7):3830-6.

PMID: 24584834

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP24979702	Poly(4-vinylphenol)		24979-70-2	Price

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