Question

What change could be seen when dopant atoms are added to an intrinsic semiconductor?

• A. It will change the proton and hole carrier concentrations of the semiconductor
• B. It will change the temperature of the semiconductor
• C. It will change the electron and hole carrier concentrations of the semiconductor
• D. It will decrease the formation of free electrons in the semiconductor

Answer 1

The correct option is C It will change the electron and hole carrier concentrations of the semiconductor

In an intrinsic semiconductor under thermal equilibrium the concentration of dopant affects the concentrations of electrons and holes.

That is,

$n=p=n=n_i$

where,

$n⟶$concentration of electrons.

$p⟶$concentration of holes.

$n_i⟶$Intrinsic concentration at given temperature.

So, when dopant atoms are added to an intrinsic semiconductor, it will change the electrons and holes carrier concentration of the semiconductor.