DIFFUSION CURRENT:
In a pn junction diode, the concentration of holes is higher on the p-side than on the n-side and because of this concentration difference, we have concentration gradients of holes from p-side to n-side. And on the other side, concentration of electrons is higher on the n-side than the p-side, so we have concentration gradient of electrons from n-side to p-side.
We have movement of charge through the cross sectional area of the junction and due to this movement there is current.
The process of movement of charge carriers from high concentration to low concentration is called as DIFFUSION. And the current is known as Diffusion Current.
The Diffusion current is because of the majority charge carriers movement from high concentration to the low concentration.
In a pn junction diode, the concentration of holes is higher on the p-side than on the n-side and because of this concentration difference, we have concentration gradients of holes from p-side to n-side. And on the other side, concentration of electrons is higher on the n-side than the p-side, so we have concentration gradient of electrons from n-side to p-side.
We have movement of charge through the cross sectional area of the junction and due to this movement there is current.
The process of movement of charge carriers from high concentration to low concentration is called as DIFFUSION. And the current is known as Diffusion Current.
The Diffusion current is because of the majority charge carriers movement from high concentration to the low concentration.
No comments:
Post a Comment