When a p-n junction is formed, the diffusion of electrons and holes leads to a space-charge region.

Question

When a p-n junction is formed, the diffusion of electrons and holes leads to a space-charge region. What does this depletion region contain?

Professor PC Thomas Classes · Answer

The depletion region is depleted of mobile charge carriers. It consists only of immobile ionised cores (positive donor ions on the n-side and negative acceptor ions on the p-side).