Question

Why intrinsic semiconductors are called P type semiconductor?

Answer 1

Intrinsic semiconductors: Semiconductors that are pure and free from impurities and whose conductivity is only due to electrons and holes and not by impurity elements are called Intrinsic semiconductors. Silicon is an example of intrinsic semiconductors.

1. Pure silicon can be doped with two types of two type of doping material in which one has $3$ electrons in the valence shell (p-type) and one has $5$ electrons in the valence shell (n-type).
2. Example of a p-type doping element is Boron ( $3$ valence electrons) and an example of n-type doping element is Phosphorous ( $5$ valence electrons ).
3. When an intrinsic semiconductor is doped with a p-type doping element then it is called a P-type semiconductor.

Hence, it a P-type semicondutor.