A paper-thin device uses quantum dots, similar to those described in this work, to light up LEDs. Credit: Lin Zhou, Xianghua Wang Light bulbs come in all sorts of forms—globes, spirals, candle-like tips, and long tubes—but few are truly thin. Now, scientists reporting in ACS Applied Materials & Interfaces have designed an LED so slender it’s nearly as thin as paper, yet it emits a cozy, sunlike glow. This new design could illuminate the future of phone and computer screens as well as other