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  • Explain the terms ‘depletion layer’ and ‘potential barrier’ in a  junction diode. How are the (a) width of depletion layer, and (b) value of potent

Explain the terms ‘depletion layer’ and ‘potential barrier’ in a p-n junction diode. How are the (a) width of depletion layer, and
(b) value of potential barrier affected when the p-n junction is forward biased ?

 

 
 
 
 
 

Answers (1)

The depletion region is the space charge region on either side of the junction, which got depleted of free charges

The potential difference developed across the junction and opposes the diffusion of charge and brings equilibrium condition is known as the potential barrier.

When a p-n junction is forward biased, the negative voltage repels the electron toward junction and give them the energy to cross the junction and combine with the hole which is also being pushed by a positive voltage. This leads to a) reduction in the depletion layer which means b) reduction in potential barrier across the junction.

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Safeer PP

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