by John Rogers
Photo: D. Stevenson and C. Conway/Beckman Institute/University of Illinois
21 August 2009—Organic light-emitting diodes, or OLEDs, are seen as the successor to liquid crystal technology for small, pixel-dense displays like the ones in laptops, smartphones, and digital cameras. Conventional inorganic LEDs, which are poised to put incandescent and fluorescent lightbulbs out to pasture, have never been in the race, because the processing techniques used to make them don’t allow scaling down to the resolution required for a pocket-size display.
