Dual-colour lasers could pave way for more energy efficient LED lighting Researchers in the US have come up with a new semiconductor device that is capable of emitting two distinct colours and could potentially open up the possibility of using LEDs universally for cheap and efficient lighting. To create the proof-of-concept device, the researchers, who hail from Arizona State University, used nano-scale materials and processes to emit green and red light separated by a wavelength of 97 nanometres. Their findings have been published in the scientific journal Semiconduct...

A new semiconductor device capable of emitting two distinct colours has been created by a group of researchers in the US, potentially opening up the possibility of using LEDs universally for cheap and efficient lighting. The proof-of-concept device, which has been presented today, 3 May, in IOP Publishing's journal Semiconductor Science and Technology, takes advantage of the latest nano-scale materials and processes to emit green and red light separated by a wavelength of 97 nanometres—a significantly larger bandwidth than a traditional semiconductor. Furthermor...