Abstract
We report the optical and electrical properties of chemically-doped bilayer graphene stack by tetracyanoethylene, a strong electron acceptor. The Tetracyanoethylene doping on the bilayer graphene via charge transfer was confirmed by Raman spectroscopy and Infrared Fourier transform spectroscopy. Doped graphene shows a significant increase in the sheet carrier concentration of up to 1.520 × 1013 cm−2 with a concomitant reduction of the sheet resistance down to 414.1 Ω/sq. The high optical transmittance (ca. 84%) in the visible region in combination with the low sheet resistance of the Tetracyanoethylene-doped bilayer graphene stack opens up the possibility of making transparent conducting electrodes for practical applications.
Highlights
The extraordinary properties of graphene, i.e. high electron mobility, high thermal and electrical conductivity, high optical transmittance, and high mechanical strength, make it a candidate material for numerous applications, including transparent conducting electrodes (TCEs).[1–4] In addition, its mechanical flexibility opens up the possibility to make bendable devices
These values correspond to the charge carrier concentration ∼1012 cm−2 and carrier mobility of 105 cm2V−1s−1.11 From the low sheet resistance and high optical transparency, graphene acquires a larger figure of merit ∼250 than that of Indium Tin Oxide (ITO), which has a sheet resistance of 10 Ω/sq with 85% optical transparency in the visible region.[6]
We present the optical and electrical properties of bilayer graphene stacks doped with tetracyanoethylene (TCNE) molecules in between the bilayer graphene sheets
Summary
The extraordinary properties of graphene, i.e. high electron mobility, high thermal and electrical conductivity, high optical transmittance, and high mechanical strength, make it a candidate material for numerous applications, including transparent conducting electrodes (TCEs).[1–4] In addition, its mechanical flexibility opens up the possibility to make bendable devices. Study on the optical and electrical properties of tetracyanoethylene doped bilayer graphene stack for transparent conducting electrodes We report the optical and electrical properties of chemically-doped bilayer graphene stack by tetracyanoethylene, a strong electron acceptor.
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