26 Mar '13, 5pm

New Solar-cell Design Based On Dots and Wires

New Solar-cell Design Based On Dots and Wires

Photovoltaics (PVs) based on tiny colloidal quantum dots have several potential advantages over other approaches to making solar cells: They can be manufactured in a room-temperature process, saving energy and avoiding complications associated with high-temperature processing of silicon and other PV materials. They can be made from abundant, inexpensive materials that do not require extensive purification, as silicon does. And they can be applied to a variety of inexpensive and even flexible substrate materials, such as lightweight plastics. But there’s a tradeoff in designing such devices, because of two contradictory needs for an effective PV: A solar cell’s absorbing layer needs to be thin to allow charges to pass readily from the sites where solar energy is absorbed to the wires that carry current away — but it also needs to be thick enough to absorb light efficiently....

Full article: http://www.renewableenergyworld.com/rea/news/article/2013...

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