The potential barrier in a p-n junction diode | vedclass

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Question

(D) When a $p-n$ junction is formed,electrons from the $n$-region diffuse into the $p$-region,and holes from the $p$-region diffuse into the $n$-regio

Vedclass · Accepted Answer

accumulation of positive and negative charges near the junction.

Vedclass · Answer

(D) When a $p-n$ junction is formed,electrons from the $n$-region diffuse into the $p$-region,and holes from the $p$-region diffuse into the $n$-region. This diffusion leaves behind immobile ionized donor atoms (positive charges) in the $n$-side and immobile ionized acceptor atoms (negative charges) in the $p$-side near the junction. This region,which is devoid of mobile charge carriers,is called the depletion region. The accumulation of these fixed positive and negative charges creates an electric field that opposes further diffusion,resulting in a potential barrier.

The potential barrier in a $p-n$ junction diode is due to

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