Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 93, Issue 5, Pages 654-656Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2008.12.004
Keywords
Solar cells; CIGS; Diffusion barrier; ZnO
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ZnO layers were deposited as diffusion barriers by DC magnetron sputtering from a pure Zn target on stainless-steel substrates. It was found that the insertion layer of ZnO between Mo film and stainless-steel substrate had no influence on the orientation and composition of CIGS films, as identified by an Xray diffractometer and X-ray fluorescence, respectively. However, ZnO diffusion barriers had strongly reduced the diffusion of Fe from stainless-steel substrates into the CIGS films, as investigated by secondary ion mass spectrometry. With such diffusion barriers, the efficiency, open-circuit voltage, and fill factor of CIGS solar cells all increased. (C) 2008 Elsevier B.V. All rights reserved.
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