_______________ is a donor impurity for semi-conductors ?
Correct answer: B. Antimony
- A. Boron
- B. Antimony
- C. Gallium
- D. None of these
Explanation
Antimony is a Group V element with five valence electrons, so when added to a Group IV semiconductor such as silicon it supplies an extra electron and forms an n-type material. Boron and gallium are Group III acceptor impurities.
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