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Photovoltaics from any semiconductor http://apocadocs.com/s.pl?1343356291
A technology that would enable low-cost, high efficiency solar cells to be made from virtually any semiconductor material has been developed by researchers....
This technology opens the door to the use of plentiful, relatively inexpensive semiconductors, such as the promising metal oxides, sulfides and phosphides, that have been considered unsuitable for solar cells because it is so difficult to taylor their properties by chemical means....
"Our technology requires only electrode and gate deposition, without the need for high-temperature chemical doping, ion implantation, or other expensive or damaging processes," says lead author William Regan....
This makes it possible for electrical contact to and carrier modulation of the semiconductor to be performed simultaneously."...
In one configuration, working with copper oxide, the Berkeley researchers shaped the electrode contact into narrow fingers; in another configuration, working with silicon, they made the top contact ultra-thin (single layer graphene) across the surface. With sufficiently narrow fingers, the gate field creates a low electrical resistance inversion layer between the fingers and a potential barrier beneath them. A uniformly thin top contact allows gate fields to penetrate and deplete/invert the underlying semiconductor. The results in both configurations are high quality p-n junctions.
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'Doc Jim says:
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Ubiquitous p-n junctions give me the Palpably Next-era Jazz!
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