Electroluminescence from graphene excited by electron tunneling

Ryan Beams, Palash Bharadwaj, Lukas Novotny
2014 Nanotechnology  
We use low-energy electron tunneling to excite electroluminescence in single layer graphene. Electrons are injected locally using a scanning tunneling microscope and the luminescence is analyzed using a wide-angle optical imaging system. The luminescence can be switched on and off by inverting the tip-sample bias voltage. The observed luminescence is explained in terms of a hot luminescence mechanism.
doi:10.1088/0957-4484/25/5/055206 pmid:24407020 fatcat:swludnrpjravdabi3fn4loch4q