Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 157, Issue -, Pages 35-41Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2016.05.001
Keywords
Substrate configuration; CdTe solar cells; SWCNT; Cu-free; Tunnel contact
Funding
- Department of Energy [DE-SC0006349]
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Substrate configuration CdTe/CdS solar cells were fabricated directly on 25 nm thick single wall carbon nanotube (SWCNT) back contacts using a high temperature, commercial deposition process. No copper was introduced to facilitate the formation of an ohmic back contact at the back of the device. The champion device had an efficiency of 6.5%. The thin SWCNT layer allowed the device to be illuminated through the back contact, and a comparison of the device performance with front and backside illumination revealed several novel features of the SWCNT back contact. Our findings indicate that SWCNT films may be useful as a recombination layer contact for bifacial solar cells, photovoltaic windows, or two-terminal thin-film tandem solar cells. (C) 2016 Elsevier B.V. All rights reserved.
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