Understanding noninvasive charge transfer doping of graphene: a comparative study

Mehta, Ankit NalinChalmers tekniska högskola,Chalmers University of Technology (författare)

In this work, we systematically investigate and compare noninvasive doping of chemical vapor deposition graphene with three molecule dopants through spectroscopy and electrical conductivity techniques. Thionyl chloride shows the smallest improvement in conductivity with poor temporal and thermal stability and nitric acid induces the biggest sheet resistance reduction with modified stability. Molybdenum trioxide doping stands out, after thermal annealing, with both causing a significant sheet-resistance reduction and having superior temporal and thermal stability. These properties make it ideal for applications in advanced electronics. Theoretical studies based on the van der Waals density functional method suggest that cluster formation of molybdenum trioxide underpins the significant reduction in sheet resistance, and the stability, that arises after thermal annealing. Our comparative study clarifies charge transfer doping of graphene and brings understanding of the weak-interaction nature of such non-destructive doping of graphene. Our work also shows that we can use weak chemisorption to tailor the electronic properties of graphene, for example, to improve conductivity. This ability open up possibilities for further use of graphene in electronic interconnects, field effect transistors and other systems.

Mu, Wei,1985Chalmers tekniska högskola,Chalmers University of Technology,Fingerprint Cards,Shanghai University(Swepub:cth)weim (författare)
Murugesan, Murali,1979Chalmers tekniska högskola,Chalmers University of Technology,SHT Smart High-Tech AB(Swepub:cth)muralim (författare)
Jiao, Yang,1985Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jiao (författare)
Fu, Yifeng,1984Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)yifeng (författare)
Hyldgaard, Per,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)hyldgaar (författare)
Liu, Johan,1960Shanghai University,Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jliu (författare)
Chalmers tekniska högskolaFingerprint Cards (creator_code:org_t)

Ingår i:Journal of Materials Science: Materials in Electronics: Springer Science and Business Media LLC29:7, s. 5239-52521573-482X0957-4522

Av författaren/redakt...: Mehta, Ankit Nal ...; Mu, Wei, 1985; Murugesan, Mural ...; Jiao, Yang, 1985; Fu, Yifeng, 1984; Hyldgaard, Per, ...; visa fler...; Liu, Johan, 1960; visa färre...

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