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Byungha Shin, Oki Gunawan, Yu Zhu, Nestor A. Bojarczuk, S. Jay Chey and Supratik Guha Thin film solar cell with 8.4% power conversion efficiency using an earth-abundant Cu2ZnSnS4 absorber Progress in Photovoltaics: Research and Applications 21

Version of Record online: 2 NOV 2011 | DOI: 10.1002/pip.1174

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Using a low temperature vacuum evaporation process with elemental sources, we have fabricated solar cells with Cu2ZnSnS4 (CZTS) absorbers. We demonstrate a solar cell power conversion efficiency of 8.4%, a number independently certified by an external, accredited laboratory. This is the highest efficiency reported for the pure sulfide CZTS prepared by any method.

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