True White LEDs on the Horizon

Today, white LEDs are not really white, but instead use techniques such as combining the light emission of separate red, blue, and green (R-G-B) LEDs, or coat blue LEDs with yellowish phosphors. Now, researchers at the University of Utah have found a way to tune the color of emission of a polymer semiconductor in hopes of creating organic light emitting diodes (OLEDs), which produce true white light.