An international team of scientists from Columbia University, Seoul National University and the Institute of Standards and Science led by Young Duck Kim and James Hon presented the world's first built-in graphene-based light source, where the function of a filament is performed by a crystal lattice of carbon 1 atom thick.
A nanolight is a graphene strip with metal electrodes mounted on a silicon base. An electric current is passed through the threads, under the influence of which they first heat up and then begin to glow.
“We created the thinnest light bulb in the world, ” says co-inventor Wong von Zhen, professor at Columbia Engineering. - This is a new type of volumetric light emitter that can be built into 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 established that its temperature reaches 2400 ° C, which is more than enough for glowing. But even at such a high temperature, the substrate and electrodes do not melt, since the heat remains inside the filaments and all the energy is converted into light.