OverviewTwo principlesPhotoelectrolytic cellOther photoelectrochemical cellsMaterials for photoelectrolytic cellsOxidation formFurther readingSee also
The standard photovoltaic effect, as operating in standard photovoltaic cells, involves the excitation of negative charge carriers (electrons) within a semiconductor medium, and it is negative charge carriers (free electrons) which are ultimately extracted to produce power. The classification of photoelectrochemical cells which includes Grätzel cells meets this narrow definition, albeit the charge carriers are often excitonic.