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arXiv · 1003.0624

Mechanisms of doping graphene

H. Pinto·R. Jones·J. P. Goss·P. R. Briddon
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Abstract

We distinguish three mechanisms of doping graphene. Density functional theory is used to show that electronegative molecule like F4-TCNQ and electropositive metals like K dope graphene p- and n-type respectively. These dopants are expected to lead to a decrease in carrier mobility arising from Coulomb scattering but without any hysteresis effects. Secondly, a novel doping mechanism is exhibited by Au which dopes bilayer graphene but not single layer. Thirdly, electrochemical doping is effected by redox reactions and can result in p-doping by humid atmospheres and n-doping by NH3 and toluene.

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H. Pinto, R. Jones, J. P. Goss, P. R. Briddon. 2010-03-02. Mechanisms of doping graphene. https://doi.org/10.1002/pssa.201000009

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