Journal
APPLIED PHYSICS LETTERS
Volume 88, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2205756
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We demonstrate CuInS2 thin film solar cell device efficiencies larger than 10% by preparing the absorber layers by reactive magnetron sputtering from metallic targets in an argon-hydrogen sulfide atmosphere. At deposition temperatures below 500 degrees C the polycrystalline films show a compact morphology with grain sizes of several micrometers. Solar cell devices show optical and electrical properties that are comparable to coevaporated or sequentially processed cells, in particular, diffusion lengths larger than 2 mu m and fill factors larger than 70%. We conclude that ion bombardment during the sputtering process does not lead to a significant increase of electronically active defects in these devices. (c) 2006 American Institute of Physics.
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