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New record efficiency for quantum-dot photovoltaics

• http://www.gizmag.com, By Colin Jeffrey
Researchers at MIT, however, have used a new method to craft solar cells from ultra-thin layers of quantum dots in a process that promises to avoid these problems, and at room temperature. At the same time, they have also set a new record of nine percent for the most efficient quantum-dot solar cells produced to date.

This latest research builds on previous work by the Lester Wolfe Professor of Chemistry, Moungi Bawendi in producing quantum dots as thin, uniform coatings with accurately governed properties. Able to be applied to a range of materials, the tiny particles contained in the film are individually very efficient at turning light into electricity.

According to Vladimir Bulovic, Fariborz Maseeh Professor of Emerging Technology in MIT’s School of Engineering, bringing them together in thin coatings "allow them to do what they do as individuals – to absorb light very well – but also work as a group, to transport charges."

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