Facile Synthesis of Ag Interlayer Doped Graphene by Chemical Vapor Deposition Using Polystyrene As Solid Carbon Source

Abstract

Graphene was synthesized by chemical vapor deposition using polystyrene as the solid carbon source. The number of graphene layers could be controlled by regulating the weight of polystyrene under atmospheric pressure at 1000 °C. Silver nanoparticles were then deposited on the graphene by a citrate reduction method. The interaction between graphene and silver was investigated by suface-enhanced Raman scattering spectra and X-ray photoelectron spectroscopy. The change in the G band position indicates n-type doping of the graphene due to an interaction between the silver and the graphene. Silver interlayer doped four-layer graphene shows a sheet resistance of 63 Ω/sq and a light transmittance of 85.4% at 550 nm. The optical and electrical quality of graphene exceeds the minimum industry standard for indium tin oxide replacement materials. It is clearly understood that the environmental sheet resistance stability of the interlayer doped graphene film is better than that of surface doped graphene sheets. The presence of graphene at the surface also acts as a protective layer for the inner silver ions and clusters.

A low-cost and one-step synthesis of N-doped monolithic quasi-graphene films with porous carbon frameworks for Li-ion batteries

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Graphene as an Electron Shuttle for Silver Deoxidation: Removing a Key Barrier to Plasmonics and Metamaterials for SERS in the Visible

“…[ 27 ] inducing n-type doping in the graphene through electron transfer driven by the work function difference. [ 28 ] A thin layer of Ag was deposited on chemical vapor deposited (CVD) graphene with the aim of controlling the transport properties of graphene by metal deposition, [ 29 ] since metals like Ag and Cu shift the Fermi level of the graphene from the Dirac point into the conduction band. Very recently, graphene has been proposed as an effective solution to the problem of silver sulfi dation, by transferring CVD graphene on silver nanoantennas.…”

Fine-tuning optical and electronic properties of graphene oxide for highly efficient perovskite solar cells

“…40 The Raman intensity ratios of the G to 2D peaks, and D to G peaks were calculated and plotted as a function of the doping concentration in Figure 2c. 42 Figure 2e shows the transmittance spectra of AgOTf-doped GO. 41 The I(G/2D) is initially proportional to doping concentrations and then saturated with a higher doping concentration.…”