Journal
THIN SOLID FILMS
Volume 549, Issue -, Pages 30-35Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2013.07.020
Keywords
Thin-film; Solar cell; CdTe; CdS; TEC15; CSS; Sputtering; CBD
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Funding
- U.S. Department of Energy SunShot program [0492-1662]
- Ohio Research Scholar Program (ORSP)
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Superstrate CdTe-based thin-film solar cells with conversion efficiencies higher than 15% have been synthesized on commercial SnO2:F/SnO2-coated soda-lime glass substrates without anti-reflection coating. The n-type CdS window layers were prepared by R. F. sputtering in an ambient containing a small amount of oxygen concentration. CdTe absorber layers were obtained by close-spaced sublimation (CSS). The post deposition CdCl2 activation was conducted in a dry air ambient. With the application of elemental Cu/Au back contacts, the best small-area CdTe cells (0.08 cm(2)) have shown an efficiency of 15.5% with an open-circuit voltage of 844 mV, a short-circuit current of 24.0 mA/cm(2), and a fill-factor of 76.6% measured under an AM1.5 illumination. This efficiency was achieved when a 1% O-2 concentration was used in sputtering ambient during CdS deposition. (C) 2013 Elsevier B. V. All rights reserved.
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