Depletion Region

In semiconductor physics, the depletion region, also called depletion layer or depletion zone, as well as the junction region or the space charge region is an insulating region within a conductive, doped semiconductor material where the charge carriers have diffused away or have been swept away by an electric field.
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an area of a semiconductor where all of the mobile carriers have been swept out by an electric field. The depletion region is depleted of carriers hence the name.

depletion region
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