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cell barrier
A very thin region of static electric charge along the interface of the positive and negative layers in a photovoltaic cell.

The barrier inhibits the movement of electrons from one layer to the other, so that higher-energy electrons from one side diffuse preferentially through it in one direction, creating a current and thus a voltage across the cell; also called depletion zone or space charge.

This entry is located in the following unit: Photovoltaic Conversion Efficiency Terms + (page 4)