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Light-emitting diode


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LED - Light-Emitting Diode - Explained and animated 3d


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how does an led work

A light-emitting diode (LED) is a semiconductor light source 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 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 device.
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  • Types 

  • History 

  • Physics of light production and emission 

  • Colors 

  • Organic light-emitting diodes (OLEDs) 

  • Considerations for use 

  • Applications 

  • Research and development