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Question: Answered & Verified by Expert
If a small amount of antimony is added to germanium crystal
PhysicsSemiconductorsNEETNEET 2011 (Screening)
Options:
  • A the antimony becomes an acceptor atom
  • B there will be more free electrons than holes in the semiconductor
  • C its resistance is increased
  • D it becomes a $p$-type semiconductor
Solution:
1047 Upvotes Verified Answer
The correct answer is: there will be more free electrons than holes in the semiconductor
When a small amount of antimony is added to germanium crystal, the crystal becomes $n$-type semiconductor because antimoney is a pentavalent substrate. It excess free electrons.

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