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Which of the following is referred to as majority carriers in a p-type material?

Which of the following is referred to as majority carriers in a p-type material? Correct Answer Holes

P-type semiconductor:

  • Extrinsic P-type Semiconductor is formed when a trivalent impurity is added to a pure semiconductor
  • Example of trivalent impurity are Boron, Gallium, and Indium
  • Trivalent impurity like boron has 3 valence electrons.
  • Each atom of the impurity fits in the silicon crystal by forming covalent bonds with the surrounding silicon atoms
  • The dopant boron atom has one less electron than surrounding silicon and thus vacancy is generated that acts as a hole. 
  • Therefore, holes are in majority in the p-type semiconductors.

Important Points

Pentavalent impurities:

Impurity atoms with 5 valence electrons produce n-type semiconductors by contributing an extra electron.

This is as explained in the figure:

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