TECH - LEDs Without Heavy Metals, Silicon Nanocrystal Multicolor LEDs Created

LEDs that are completely free of heavy metals have been successfully created by researchers at the Karlsruhe Institute of Technology and the University of Toronto. The highly efficient and heavy-metal-free LEDs were made by utilizing silicon nanocrystals that are only a few nanometers across. The silicon-based light-emitting diodes (SiLEDs) should eventually be able to take the place of any currently used LEDs, but without having the same envi ...

http://cleantechnica.com/2013/02/23/leds-without-heavy-metals-silicon-