Statement I: The depletion layer in the $p-n$ junction is free from mobile charge carriers.\ Statem

Question

Statement I: The depletion layer in the $p-n$ junction is free from mobile charge carriers.\ Statement II : There is no electric field across the junction barrier.

Professor PC Thomas Classes · Answer

(b) : Due to diffusion of holes from the p-region to the $n$-region and of electrons from the $n$-region to the $p$-region an electric field is set up across the junction barrier. Once the depletion layer is formed it is in equilibrium and becomes free of mobile charge carriers.