Abstract
Transparent conductive film on a plastic substrate is a critical component in low cost, flexible and lightweight optoelectronics. CVD graphene transferred from copper- to ethylene vinyl acetate (EVA)/polyethylene terephthalate (PET) foil by hot press lamination has been reported as a robust and affordable alternative to manufacture highly flexible and conductive films. Here, we demonstrate that annealing the samples at 60 C under a flow of nitrogen, after wet etching of copper foil by nitric acid, significantly enhances the Hall mobility of such graphene films. Raman, Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were used to evaluate the morphology and chemical composition of the graphene.
Highlights
The annealing temperature for graphene transferred to ethylene vinyl acetate (EVA)/polyethylene terephthalate (PET) is limited by the low melting point of the EVA-based glue layer of a lamination foil
We show that despite this limitation, annealing of graphene on EVA/PET even at such a low temperate still helps to remove adsorbed chemical species
We demonstrate that HNO3 etching of Cu from transferred Chemical vapor deposition (CVD) graphene on to EVA/PET introduces various functional oxygen groups
Summary
Citation: Khan, M.; Indykiewicz, K.; Tam, P.L.; Yurgens, A. High MobilityGraphene on EVA/PET.Nanomaterials 2022, 12, 331. https://doi.org/10.3390/nano12030331Academic Editor: Filippo Giannazzo and Ivan ShtepliukReceived: 14 December 2021Accepted: 17 January 2022Published: 21 January 2022Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.Licensee MDPI, Basel, Switzerland.Attribution (CC BY) license (https://
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