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Open AccessArticle

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

Graduate Institute of Optoelectronic Engineering and Department of Electrical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
Department of Materials Science and Engineering, Da-Yeh University, Changhua 51591, Taiwan
Author to whom correspondence should be addressed.
Academic Editor: Senthilarasu Sundaram
Energies 2016, 9(11), 975;
Received: 12 August 2016 / Revised: 11 November 2016 / Accepted: 16 November 2016 / Published: 22 November 2016
PDF [1274 KB, uploaded 23 November 2016]


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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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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