Light-emitting diode - Wikipedia
https://en.wikipedia.org/wiki/Light-emitting_diode
OverviewHistoryPhysics of light production and emissionSingle-color LEDsWhite LEDsOrganic light-emitting diodes (OLEDs)Perovskite Light-emitting diodes (PeLEDs)TypesA light-emitting diode (LED) 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 (corresponding to the energy of the photons) is determined by the energy required for electrons to cross the band gap of the semiconductor. White light is obtained by using multiple semiconductors or a layer of light-emitting phosphor on the semiconductor devi… First production: October 1962; 61 years ago
First production: October 1962; 61 years ago
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