NEET Physics Question - Semiconductor Physics - Properties of Semiconductors

Assertion (A): Electron hole recombination takes place in P-region and N-region of PN Junction diode except in depletion region.

Reason (R): Electric field in depletion region oppose the diffusion.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Assertion (A) is generally true in simplified models, where most recombination occurs in the quasi-neutral P and N regions. While some recombination does occur in the depletion region, its contribution to the overall current is often considered secondary for typical forward-biased diodes.

Reason (R) is true; the electric field in the depletion region acts as a barrier, opposing the diffusion of majority carriers across the junction. (R) does not explain the spatial distribution of recombination described in (A).

Rankers Physics

PN Junction Recombination

Solution:

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