Question

When an impurity is doped into an intrinsic semiconductor, the conductivity of the semiconductor

Options

• increases

• decreases

•  remains the same

•  become zero.

Answer 1

increases

When an impurity (either a p-type atom or an n-type atom) is doped into an intrinsic semiconductor, it increases the number of charge carriers in the intrinsic semiconductor. As conductivity is directly related to the number of charge carriers, the conductivity of a semiconductor increases with doping.