Semiconductor physics

What are the majority carriers in a p-type semiconductor?

  1. AIonized acceptors
  2. BHoles
  3. CElectrons
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Answer: B. Holes

In a p-type semiconductor, acceptors take electrons from the valence band, so holes become abundant. The majority carriers are therefore holes and the minority carriers are electrons. Ionized acceptors are negative charges fixed in the crystal and cannot move to carry current.

  • A. Ionized acceptors are fixed charges that cannot move, so they are not carriers.
  • B. Correct. The majority carriers in p-type material are holes.
  • C. Electrons are the minority carriers in a p-type semiconductor.
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More Semiconductor physics questions

  1. Which of the following materials has the largest band gap?
  2. Which is the correct unit of carrier mobility?
  3. With electron density n, hole density p, electron mobility μn, hole mobility μp and elementary charge q, which expression gives the conductivity σ of a semiconductor?
  4. What is the process called in which electrons and holes recombine through deep levels (traps) in the band gap?
  5. With minority carrier diffusion coefficient D and lifetime τ, which expression gives the diffusion length L?