08 Sep '11, 12pm

Making Cheaper and More Efficient Solar Cells with Copper

Making Cheaper and More Efficient Solar Cells with Copper

In order to achieve a high level of efficiency, the front contacts in the solar cell not only have to exhibit a low level of loss with light-generated current but also cover the least amount of the cell surface possible. Technologically speaking, materials with high conductivity work best. Traditionally speaking, silver has been the metal of choice. In the current industry standard, the relatively wide and porous contacts are produced by screen-printing silver pastes . The ETAlab team’s switch from silver to copper reduced the cost by around 10%, due to the significant difference in price. The electro-plating processes necessary to generate the contacts with copper were also comparatively inexpensive.

Full article: http://cleantechnica.com/2011/09/08/making-cheaper-and-mo...

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