• UGI USER
  • Jan 18, 2024
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LIGHT-EMITTING DIODES (LEDS): ILLUMINATING THE FUTURE

Focus: Light-Emitting Diodes (LEDs)

Source: openworldlearning

What are LEDs ?

  • Light-emitting diodes (LEDs) are tiny semiconductor devices that convert electricity directly into light.
  • Light-Emitting Diodes (LEDs) are electronic components with a p-n junction that emits light when an electric current passes through.
  • Electrons recombine with holes, releasing energy in the visible spectrum

Understanding Diodes:

  • Diode Basics: Electronic component with anode and cathode, enabling one-way current flow via a p-n junction.
  • P-n Junction: Interface of p-type (holes) and n-type (electrons) materials creating diode asymmetry.
  • Diodes emit light due to electron-hole recombination.
  • Band gap determines the energy emitted as visible light.

Advantages and Applications:

  • More efficient, durable, and cost-effective than traditional bulbs.
  • Applications range from smartphones to greenhouses.
  • LEDs can produce various colours by combining red, green, and blue.
  • Widely used in industry, electronics, and households.
  • Replacing incandescent bulbs and fluorescent lamps.