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The Raudive Diode and Its Place in History - iDigitalMedium
A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–n junction diode, ... Russian inventor Oleg Losev reported creation of the first LED in 1927. ... (IR) light-emitting diode (U.S. Patent US3293513), the first practical LED. .... LEDs are usually built on an n-type substrate, with an electrode attached to ...
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