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Qijie Guo, Grayson M. Ford, Rakesh Agrawal and Hugh W. Hillhouse Ink formulation and low-temperature incorporation of sodium to yield 12% efficient Cu(In,Ga)(S,Se)2 solar cells from sulfide nanocrystal inks Progress in Photovoltaics: Research and Applications 21

Version of Record online: 3 MAY 2012 | DOI: 10.1002/pip.2200

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A novel nanocrystal ink formulation and low-temperature solution-based method for the incorporation of Na for copper indium gallium disulfoselenide (CIGSSe) thin film have been developed. Simple ink formulation using alkanethiol as the solvent enables the deposition of uniform nanocrystal coatings over large area using knife coating. The addition of sodium plays an important role in improving the structural properties of the resulting CIGSSe films, which reduces recombination losses yielding devices with 12.0% total area efficiency.

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