The type of impurity that has to be added to a semiconductor material so that it can provideholes is
Correct answer: A. trivalent.
- A. trivalent.
- B. tetravalent.
- C. pentavalent.
- D. monovalent.
Explanation
The type of impurity that needs to be added to a semiconductor material to provide holes is A) trivalent.Explanation:When a trivalent impurity (like Boron, Aluminum, or Gallium) is added to a pure semiconductor (like Silicon or Germanium), it creates a "hole" in the crystal lattice. This is because trivalent atoms have only three valence electrons, while the semiconductor atoms have four. This deficiency of an electron creates a positive "hole" which can then act as a charge carrier, leading to p-type semiconductors.
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About PN Junction
A PN junction forms when p type and n type semiconductor regions meet, creating a depletion layer and a potential barrier. The topic covers forward and reverse bias, diode current voltage characteristics, breakdown and rectification, while distinguishing an ordinary junction diode from a transistor formed from multiple junctions.
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