Scientists have developed a new material that may not only provide efficient lighting, but also power wireless Internet with data speed of up to two gigabytes per second.
Researchers from King Abdullah University of Science and Technology (KAUST) in Saudi Arabia developed the new nanocrystalline material that rapidly makes white light out of blue light.
Visible-light communication (VLC) makes use of parts of the electromagnetic spectrum that are unregulated and is potentially more energy-efficient, researchers said.
While WiFi nd Bluetooth are now well established technologies, there are several advantages gained by shortening the wavelength of the electromagnetic waves used for transmitting information.
VCL also offers a way to combine information transmission with illumination and display technologies – for example, using ceiling lights to provide internet connections to laptops, they said.
“VLC using white light generated in this way is limited to about one hundred million bits per second,” said Boon Ooi, a professor at KAUST.
Researchers instead used a nanocrystal-based converter that enables much higher data rates.
They created nanocrystals of cesium lead bromide that were roughly eight nanometres in size using a simple and cost-effective solution-based method that incorporated a conventional nitride phosphorus.
Scientists were able to show that the optical processes in cesium lead bromide nanocrystals occur on a time-scale of roughly seven nanoseconds.
This meant they could modulate the optical emission at a frequency of 491 Megahertz, 40 times faster than is possible using phosphorus, and transmit data at a rate of two billion bits per second, researchers said.
The white light generated using their perovskite nanostructures was of a quality comparable to present LED technology, researchers said.