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Electrodeposition of crystalline silicon films from silicon dioxide for low-cost photovoltaic applications

Author(s)
Sadoway, Donald Robert
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Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/
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Abstract
Crystalline-silicon solar cells have dominated the photovoltaics market for the past several decades. One of the long standing challenges is the large contribution of silicon wafer cost to the overall module cost. Here, we demonstrate a simple process for making high-purity solar-grade silicon films directly from silicon dioxide via a one-step electrodeposition process in molten salt for possible photovoltaic applications. High-purity silicon films can be deposited with tunable film thickness and doping type by varying the electrodeposition conditions. These electrodeposited silicon films show about 40 to 50% of photocurrent density of a commercial silicon wafer by photoelectrochemical measurements and the highest power conversion efficiency is 3.1% as a solar cell. Compared to the conventional manufacturing process for solar grade silicon wafer production, this approach greatly reduces the capital cost and energy consumption, providing a promising strategy for low-cost silicon solar cells production.
Date issued
2019-12
URI
https://hdl.handle.net/1721.1/127769
Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Citation
Zou, Xingli et al. “Electrodeposition of crystalline silicon films from silicon dioxide for low-cost photovoltaic applications.” Nature Communications, 10, 1 (December 2019): © 2019 The Author(s)
Version: Final published version
ISSN
2041-1723

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