A boron nitride - graphene - C$_{60}$ heterostructure

ORAL

Abstract

We have fabricated a new van-der-Waals heterostructure composed by BN/graphene/C$_{60}$. We performed transport measurements on the preliminary BN/graphene device finding a sharp Dirac point at the neutrality point. After the deposition of a C$_{60}$ thin film by thermal evaporation, we have observed a significant n-doping of the heterostructure. This suggests an unusual electron transfer from C$_{60}$ into the BN/graphene structure. This BN/graphene/C$_{60}$ heterostructure can be of interest in photovoltaic applications. It can be used to build devices like p-n junctions, where C$_{60}$ can be easily deposited in defined regions of a graphene junction by the use of a shadow mask. Our results are contrasted with theoretical calculations.

–

Authors

  • Claudia Ojeda-Aristizabal

    • Dept. of Physics, Univ of California - Berkeley
    • UC Berkeley

  • Elton J.G. Santos

    • Department of Chemical Engineering, Stanford University, Stanford, California 94305, USA
    • Department of Chemical Engineering, Stanford University

  • Seita Onishi

    • UC Berkeley

  • Haider Rasool

    • UC Berkeley, Center of Integrated Nanomechanical Systems, University of California, Berkeley
    • UC Berkeley

  • Jairo Velasco Jr.

    • University of California at Berkeley
    • UC Berkeley

  • Salman Kahn

    • UC Berkeley
    • Department of Physics, University of California, Berkeley

  • Aiming Yan

    • Dept. of Physics, Univ of California - Berkeley; Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley
    • UC Berkeley, Materials Sciences Division, Lawrence Berkeley National Laboratory

  • Alex Zettl

    • Dept. of Physics, Univ of California - Berkeley; Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley;
    • Physics Department, COINS, UC Berkeley. Kavli Energy NanoSciences Institute, UC Berkeley, Materials Science Division, Lawrence Berkeley National Lab
    • UC Berkeley, Materials Sciences Division, Lawrence Berkeley National Laboratory, Kavli Energy NanoSciences Institute at UC Berkeley
    • Department of Physics, University of California - Berkeley
    • UC Berkeley
    • Department of Physics, University of California at Berkeley; Materials Sciences Division, Lawrence Berkeley National Laboratory