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Title:
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Enhanced light trapping in thin film silicon solar cells by zinc oxide nanorods
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Author(s):
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Published by:
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Publication date:
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ECN
Solar Energy
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22-9-2014
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ECN report number:
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Document type:
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ECN-M--14-052
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Conference Paper
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Number of pages:
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Full text:
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3
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Download PDF
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Abstract:
In this contribution, the ZnO nanorods (NRs) are demonstrated as a very effective light scattering medium at the rear side of nip thin-film silicon solar cells grown on flexible stainless steel foil. After the implementation of the ZnO NRs, the Haze of the back reflector is increased by about 40% at almost all wavelengths from 300 nm to 1200 nm. The Haze increases up to about 90% over the entire visible wavelength regime after the ZnO NRs are coated with the back reflector consisting of Ag and aluminum doped zinc oxide (AZO). Even in comparison to a reference cell with a nano-imprinted replica of Asahi-U texture at the rear side, the application of the ZnO NRs in the hydrogenated amorphous silicon (a-Si:H) solar cell can lead to a Jsc increase of 1.4 mA/cm2 and an absolute efficiency increase of 0.72%
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