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If that silly Hummer O2 concept vehicle we just saw didn't sate your appetite for environmental friendliness, try this on for size: researchers at Boeing-Spectrolab have just succeeded in building a multi-junction solar cell that achieves an incredible 40.7% efficiency, or -- to the best of our knowledge -- about twice that of the reigning champ in this space. To put this Department of Energy-backed breakthrough in perspective, it was less than two months ago that Silicon Valley-based SunPower announced a 22% efficient cell, and even that model was claimed to produce 50% more power over a given space than previous iterations. |
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