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

Hsin-Yu Wu, Chia-Hsun Hsu, Shui-Yang Lien and Yeu-Long Jiang
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Hsin-Yu Wu: Graduate Institute of Optoelectronic Engineering and Department of Electrical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
Chia-Hsun Hsu: Department of Materials Science and Engineering, Da-Yeh University, Changhua 51591, Taiwan
Shui-Yang Lien: Department of Materials Science and Engineering, Da-Yeh University, Changhua 51591, Taiwan
Yeu-Long Jiang: Graduate Institute of Optoelectronic Engineering and Department of Electrical Engineering, National Chung Hsing University, Taichung 40227, Taiwan

Energies, 2016, vol. 9, issue 11, 1-6

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.

Keywords: silicon thin-film solar cells; aluminum–titanium (AlTi) alloy; contact resistance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
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