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Impact of spectral effects on the electrical parameters of multijunction amorphous silicon cells

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conference contribution
posted on 15.03.2011, 15:51 by Thomas R. Betts, Christian N. Jardine, Ralph Gottschalg, David Infield, Kevin Lane
The influence of spectral variation on the efficiency of single-, double- and triple-junction amorphous silicon cells has been investigated. The average photon energy (APE) proves to be a useful device-independent environmental parameter for quantifying the average hue of incident spectra. Single-junction devices increase in efficiency as light becomes blue shifted, because more of the incident spectrum lies within the absorption window and less in the redlinfra-red tail; this is denoted the primary spectral effect. Double- and triple-junction devices also exhibit a secondary spectral effect due to mismatch between the device structure and the incident spectrum. These both reach a maximum efficiency, which drops off as light is red or blue shifted. The effect is more pronounced for triple-junction than double-junction devices, as mismatch between junctions is statistically more likely.
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  • Mechanical, Electrical and Manufacturing Engineering

Research Unit

  • Centre for Renewable Energy Systems Technology (CREST)

Citation

BETTS, T.R....et al., 2003. Impact of spectral effects on the electrical parameters of multijunction amorphous silicon cells. IN: Proceedings of 3rd World Conference on Photovoltaic Energy Conversion, Osaka, Japan, 11-18 May, 2, pp. 1756-1759

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© IEEE

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VoR (Version of Record)

Publication date

2003

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ISBN

4990181603

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en

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