1. Tardigrade
  2. Question
  3. Physics
  4. Depletion layer consists of:

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Depletion layer consists of:

ManipalManipal 2005Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

The depletion layer consists of immobile ions because the depletion layer is formed by diffusion of holes and electrons from the $p$-type semiconductor to the $n$-type semiconductor, and vice versa.
Thus, donor and acceptor atoms gain positive and negative charges leading to $p$-n junction formation.
Thus, donor and acceptor are thus immobile ions.
Option A is incorrect because electrons can't reside inside the depletion region.
Option B is incorrect because proton doesn't reside inside the depletion layer.
Option C is incorrect because mobile ions can move but inside the depletion layer, ions can't movie.