Electroluminescence from graphene excited by electron tunneling

Nanotechnology. 2014 Feb 7;25(5):055206. doi: 10.1088/0957-4484/25/5/055206. Epub 2014 Jan 9.


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.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.