Physics - Semiconductors Question with Solution | TestHub

In a reverse-biased p-n junction, the applied reverse voltage adds to the built-in potential barrier, increasing the total potential difference across the junction.

The electric field is zero in the neutral p and n regions outside the depletion layer. Within the depletion layer, the electric field is directed from the n-side to the p-side and is given by the potential gradient $E=-\frac{dV}{dx}$.

Because the potential changes significantly over the very small width of the depletion layer, the electric field is very high and reaches its maximum value at the metallurgical junction. Therefore, in the depletion layer, the electric field is maximum.

Answer: electric field is maximum.