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Energies 2016, 9(11), 975; doi:10.3390/en9110975

Aluminum–Titanium Alloy Back Contact Reducing Production Cost of Silicon Thin-Film Solar Cells

1
Graduate Institute of Optoelectronic Engineering and Department of Electrical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
2
Department of Materials Science and Engineering, Da-Yeh University, Changhua 51591, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Senthilarasu Sundaram
Received: 12 August 2016 / Revised: 11 November 2016 / Accepted: 16 November 2016 / Published: 22 November 2016
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Abstract

In this study, metal films are fabricated by using an in-line reactive direct current magnetron sputtering system. The aluminum–titanium (AlTi) back contacts are prepared by changing the pressure from 10 mTorr to 25 mTorr. The optical, electrical and structural properties of the metal back contacts are investigated. The solar cells with the AlTi had lower contact resistance than those with the silver (Ag) back contact, resulting in a higher fill factor. The AlTi contact can achieve a solar cell conversion efficiency as high as that obtained from the Ag contact. These findings encourage the potential adoption of AlTi films as an alternative back contact to silver for silicon thin-film solar cells. View Full-Text
Keywords: silicon thin-film solar cells; aluminum–titanium (AlTi) alloy; contact resistance silicon thin-film solar cells; aluminum–titanium (AlTi) alloy; contact resistance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wu, H.-Y.; Hsu, C.-H.; Lien, S.-Y.; Jiang, Y.-L. Aluminum–Titanium Alloy Back Contact Reducing Production Cost of Silicon Thin-Film Solar Cells. Energies 2016, 9, 975.

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