In?semiconductor?physics, the?depletion region, also called depletion layer,?depletion?zone, junction?region, space charge?region?or space charge?layer, is an insulating?regionwithin a conductive, doped?semiconductor?material where the mobile charge carriers have been diffused away

the holes from the n-type semiconductor are pushed towards the junction by the positive terminal of the battery. This movement of electrons and holes constitutes a current called reverse saturation current.??The term?saturation?refers to the fact that it reaches its maximum value very quickly and does not change significantly with increase in reverse bias potential.

In the middle of the depletion layer of a reverse biased p-n-junction, the electric field is maximum

The difference in variation of resistance with temperature in a metal and semiconductor is due to crystal structure