Investigadores japoneses ganan el nobel de Fisica por un humilde invento: El led azul Isamu Akasaki, Hiroshi Amano and UCSB’s Shuji Nakamura were all working on the a blue LED in Japan back in the 1990s. At that time, red and green LEDs had already existed for decades, but blue proved elusive. Remember that red, green and blue light together create white light, so for lightbulbs and full-color screens, the missing blue LED was crucial. To get LEDs to glow blue, the researchers had to create a new material. LEDs emit light when electrons pass through layers of semiconducting material—the color of light depends on the composition of that material. Akasaki, Amano, and Nakamura ended up making blue LEDs out of the element gallium.
Posted on: Fri, 10 Oct 2014 03:22:45 +0000
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