The ultra-thin light bulb was designed and developed by a group of researchers led by Young Duck Kim, a scientist at Columbia University School of Engineering in collaboration with researchers from Korea Research Institute of Standards and Science and Seoul National University.
According to the scientists, they have succeeded in creating the first light bulb using graphene as its filament.
The light bulb was made by attaching small strips of graphene to some metal electrodes. Then they suspended the graphene strips above the substrate and heated them up by passing a current through the filaments.
Hone, Wang Fon-Jen, professor of mechanical engineering at Columbia Engineering, talked about the new project saying that he and his team have created the smallest light bulb in the world.
Professor Hone added that this type of “broadband” light source can pave the way for a new generation of atomically thin, very flexible and transparent displays, based on graphene.
The scientists said that this type of small structure is very important for the development of integrated “photonic” circuits that will use light the way electric currents are used in semiconductor integrated circuits.
The engineers have had many attempts to do this but until now, they have never been able to integrate the light bulb into a chip.
According to the experts, the filaments of the light bulb must reach extremely hot temperatures (thousands of degrees Celsius) in order to be able to emit light.
The scientists measured the spectrum of the light that the graphene emits and were able to show that it could reach temperatures of more than 2500 degrees Celsius, which was hot enough to emit a bright light.
Kim said that the light emitted by the graphene light bulb is so strong that it can be seen with the naked eye without needing to be magnified.
The team of scientists is currently trying to improve the performance of the graphene light bulbs. They want to be able to learn how fast they can be turned off and on and how to integrate them into flexible substrates.
Image Source: i4u