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Question: Answered & Verified by Expert
In case of p-n junction diode, the width of depletion region is
PhysicsSemiconductorsMHT CETMHT CET 2019 (Shift 2)
Options:
  • A Decreased with heavy doping
  • B Increased by reserve biasing
  • C Decreased with light doping
  • D Increased by forward biasing
Solution:
2241 Upvotes Verified Answer
The correct answer is: Increased by reserve biasing
In case of p – n junction diode, when it is reserved biased, the reserve voltage supports the barrier potential and hence the width of the depletion layer increases.
In forward biasing, the width decreases as the forward voltage opposes the potential barrier.
The width of the depletion region increases, if the diode is further doped heavily as the movement of charge carrier decrease.

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