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A photodiode works on the principle of

A photodiode works on the principle of Correct Answer photo - conductive effect

CONCEPT:

  • A photodiode is one type of light detector, used to convert the light into current or voltage.
  • The working principle of a photodiode is, when a photon of ample energy strikes the diode, it makes a couple of an electron-hole.
  • This mechanism is also called as the photoconductive effect. So option 2 is correct.
  • Photoconductive detectors use the increase in electrical conductivity resulting from increase in the number of free carriers generated when photons are absorbed (generation of current)

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  • User may get confused with the photoelectric effect and photoconductive effect.
  • The photoconductive effect is special case of photoelectric effect where the device is reversed biased.

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