The nanolamp is a strip of graphene with metal electrodes mounted on a silicon base. Through the filaments, an electric current is passed, under the action of which they first heat up, and then begin to glow.
“We created the thinnest light bulb in the world,” says one of the co-authors of the invention, Wong von Wen, a professor at Columbia Engineering. – This is a new kind of volumetric light emitter that can be embedded in atomically thin chips. In the future they will find their application in flexible displays based on graphene. “
By measuring the spectrum of light emitted by graphene, scientists have determined that its temperature reaches 2400 ° C, and this is more than enough for glow. But even at such a high temperature, the substrate and electrodes do not melt, as the heat remains inside the filaments and all energy is converted into light.