Addition of pentavalent impurity to a semiconductor creates many________________?
Correct answer: A. Free electrons
- A. Free electrons
- B. Holes
- C. Valence electrons
- D. Bound electrons
Explanation
A pentavalent impurity has five valence electrons; four form covalent bonds and the fifth becomes a loosely bound conduction electron. Such dopants are donors and produce an n-type semiconductor.
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