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Light-emitting diode

A light-emitting diode is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light is determined by the... Wikipedia
Invented: H. J. Round (1907); Oleg Losev (1927); James R. Biard (1961); Nick Holonyak (1962);
First production: October 1962; 61 years ago
Pin configuration: Anode and cathode
Working principle: Electroluminescence