Question

How does the depletion region decrease in forwarding bias?

Answer 1

Depletion Region:
The thin layer region with immobile ions and no charge carriers on either side of a p-n junction is known as a depletion region or depletion layer.

Forward Bias:

1. A p-n junction is said to be forward-biased if the positive terminal of the external battery is connected to the p-side and the negative terminal is attached to the n-side. The voltage drop across the p-side and n-side of the p-n junction during forwarding biassing is extremely little.
2. The applied DC voltage opposes the imaginary battery created at the p-n junction during forwarding biassing. Because of this, the potential drop across the junction is reduced, which causes an increase in the diffusion of holes and electrons across the junction. The junction diode has low resistance during forwarding bias because it thins the depletion layer.