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A PV cell is made up of silicon, boron and phosphorus that is just an example. The silicon is a semi-conductive element that gets "excited" when struck by sunlight. There are no moving parts, merely reactions, which produce an internally effected electric voltage and externally effected current that is carried through wires within the cell to an electrical circuit. The boron and phosphorus are added to the outside doped (internal not external) of the silicon to act as positive and negative chargesto create an abundance of holes or electrons. These doped layers, while alone are electrically neutral, create a voltage difference in the depletion zone as the holes and electrons migrate across the contact surface.
Check out the history tab for the category page and compare your last edit to my most recent edit to see all the changes. I made many small changes without using the bold and italic text to note it.
This is a long one... with lots of information, especially for a category page. What about moving it to a regular page, and splitting it up into seperate pages so that we can add product reviews, external links, etc. to each of the elements... nice graphics. Ericblazek 08:55, 10 January 2007 (PST)