Polycrystalline silicon on glass for thin-film solar cells |
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Authors: | Martin A Green |
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Institution: | (1) ARC Photovoltaics Centre of Excellence, University of New South Wales, NSW, 2052 Sydney, Australia |
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Abstract: | Although most solar cell modules to date have been based on crystalline or polycrystalline wafers, these may be too material
intensive and hence always too expensive to reach the very low costs required for large-scale impact of photovoltaics on the
energy scene. Polycrystalline silicon on glass (CSG) solar cell technology was developed to address this difficulty as well
as perceived fundamental difficulties with other thin-film technologies. The aim was to combine the advantages of standard
silicon wafer-based technology, namely ruggedness, durability, good electronic properties and environmental soundness with
the advantages of thin-films, specifically low material use, large monolithic construction and a desirable glass superstrate
configuration. The challenge has been to match the different preferred processing temperatures of silicon and glass and to
obtain strong solar absorption in notoriously weakly-absorbing silicon of only 1–2 micron thickness. A rugged, durable silicon
thin-film technology has been developed with amongst the lowest manufacturing cost of these contenders and confirmed efficiency
for small pilot line modules already in the 10–11% energy conversion efficiency range, on the path to 12–13%. |
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Keywords: | PACS" target="_blank">PACS 72 40 +w 84 60 -h 89 30 Cc |
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