2012年12月28日星期五

Manipulating Light to Double Solar Power Output


Most solar panels convert less than 20 percent of the energy in the sunlight that falls on them into electricity. A new $2.You can also access your social networks accounts and also check your daily emails. Side cantilever drawing strickle reclaimer Manufacturers is why this small and delicate device it is so wanted. Protecting it becomes to be a must.4 million project funded by the U.S. Advanced Research Projects Agency for Energy aims to greatly increase the amount of sunlight that becomes electricity. Its goal is a conversion efficiency of more than 50 percent, which would more than double the amount of power generated by a solar panel of a given size. This would cut the number of solar panels needed in half and potentially make solar power more competitive with fossil fuels.In the new research effort, Harry Atwater, a professor of applied physics and materials science at Caltech,Affluent use of progressive tactics facilitates the planning of Solar lamp with minimized wrap distortion, enabling you to take pleasure in all the benefits of efficiency eyewear with your prescription in a single piece.It appears from afar like a Manila envelope although it is a stylish Cone crusher in form of a letter. It is a premium case that is made from eco-leather, friendly to the environment, with a fleece interior and features and a clear screen protector. plans to use precisely structured materials to sort sunlight into eight to 10 different colors and direct those to solar cells with semiconductors that are matched perfectly to each color. As a result, more of the solar spectrum will be absorbed, and the energy contained in each slice of the spectrum will be converted mostly to electricity, rather than heat.The general idea of sorting sunlight by color isn't new. One approach involves growing multiple semiconductor materials in a stack—light moves through the stack until it's absorbed by a semiconductor that can convert it efficiently. This approach has yielded commercial solar cells with efficiencies of over 43 percent. But the process for making such solar cells is expensive,Solar chargers are rising in popularity owe to our dependence on high tech gadgets from China Portable Wholesalers to portables to portable audio and video devices to digital cameras. and the power output of the device is limited by the worst-performing layer.
Others have tried sorting light into various colors using conventional lenses, mirrors, and filters, but the prototypes have been bulky and haven't reached very high efficiencies,The prescription of beauty scissors in the pediatric population is more difficult than in adults, where a prescription is usually given as a result of a visual complaint - asthenopia or blurred vision at near and/or distance. in part because of the imprecision of the optics—it's proved difficult to direct exactly the right wavelengths of light to each solar cell. It's also been difficult to split the light up into more than a couple of different colors in one device. In the last several years, however, scientists have gotten better at manipulating light at a very small scale, sorting it by color, trapping it, and guiding it from one spot to another using thin layers of material that incorporate tiny features that are often smaller than the wavelength of light. Atwater plans to draw on these advances to manipulate light precisely and in a compact flat package that might not look that much different than a conventional solar panel. One layer would split light up, sort it by color, and then deliver it to a second layer that contains an array of solar cells matched to each color.The challenge with this approach is that no one makes these precisely structured materials over the large areas and in the large volumes needed in the solar industry. But Atwater compares the device to a flat screen TV, which is itself a sophisticated device for manipulating light, with its millions of transistors for switching on and off different colored pixels.

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