p-type semiconductor is doped with:
- Pentavalent
- Pure Si
- Trivalent atom (B, Al, Ga) — acceptor
- No doping
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Correct answer: C. Trivalent atom (B, Al, Ga) — acceptor
Trivalent dopants create hole (missing one electron in covalent bond).
**Majority carriers:** holes. Minority: electrons.
Acceptor level just above VB.