Light-emitting diode

A light-emitting diode (LED) is a semiconductor device that emits incoherent narrow-spectrum light when electrically biased in the forward direction. This effect is a form of electroluminescence. The color of the emitted light depends on the chemical composition of the semiconducting material used, and can be near-ultraviolet, visible or infrared. Nick Holonyak Jr. (born 1928) of the University of Illinois at Urbana-Champaign developed the first practical visible-spectrum LED in 1962.http://web.mit.edu/invent/a-winners/a-holonyak.html

Related Topics:
Light - Diode - Semiconductor - Incoherent - Electroluminescence - Chemical - Composition - Ultraviolet - Visible - Infrared - Nick Holonyak Jr. - University of Illinois at Urbana-Champaign - 1962

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