Solar power lightens up with thin-film technology

Cheap, durable, efficient devices are needed to generate a significant amount of electricity from the sun. So-called thin-film photovoltaic cells may be just the ticket.

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In fact, cadmium telluride solar cells are currently the most ecofriendly devices, even though they use a toxic heavy metal, primarily because they require the least energy—typically provided by burning fossil fuels—to manufacture, says environmental engineer Vasilis Fthenakis, senior scientist at Brookhaven National Laboratory's National Photovoltaic Environment Research Center in Upton, N.Y., and Columbia University.

Sources: http://www.scientificamerican.com/article.cfm?id=solar-power-lightens-up-with-thin-film-cells(external link)
http://www.popularmechanics.com(external link)