The 2014 Nobel Prize in Physics was recently awarded to three scientists (Isamu Akasaki, Hiroshi Amano, and Shuji Nakamura) for inventing the blue light-emitting diode (LED) roughly 20 years ago.
It’s hard to believe that the first blue LED didn’t arrive until 1993. They look simple, but looks are deceiving. Producing various LED colors involved applying electric currents to materials with ...
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