Polymer solar panels that are cheaper, lighter and greener
Nevertheless, this technology has a drawback: very low efficiency. While state-of-the-art silicon panels can yield 40 percent efficiency, commercially available panels usually get about 15 percent. Greenham's target is 5 percent, which could power many types of devices with a cheaper cost. To make things more interesting, the scientists want to "print" solar cells with an ultra-thin mix of two semiconducting polymers on a flexible plastic backing up to one meter wide. The process, which would be low-temperature, would have a much smaller carbon footprint.
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