Which of the following statements is correct during the formation of a PN junction?
Show Hint
Always remember the direction of diffusion in a PN junction:
\[
\boxed{
\begin{aligned}
\text{Electrons} &:\; N \rightarrow P,\\
\text{Holes} &:\; P \rightarrow N.
\end{aligned}
}
\]
The diffusion of charge carriers forms the depletion layer and the built-in potential barrier.
Electrons diffuse from the P-region to the N-region.
Holes diffuse from the N-region to the P-region.
Electrons diffuse from the N-region to the P-region.
Holes drift from the N-region to the P-region.
Show Solution
The Correct Option isC
Solution and Explanation
When a PN junction forms, majority carriers diffuse across the junction and recombine, creating a depletion region of immobile ionised dopant atoms. The resulting built-in electric field grows until it exactly opposes further diffusion, establishing thermal equilibrium.