Experimental study of variations of the solar spectrum of relevance to thin film solar cells |
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| Authors: | R. Gottschalg D. G. Infield M. J. Kearney |
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| Affiliation: | a Centre for Renewable Energy Systems Technology, Department of Electronic and Electrical Engineering, Lougborough University, Loughborough, Leicestershire LE11 3TU, UK;b Department of Electronic and Electrical Engineering, Lougborough University, Loughborough, Leicestershire LE11 3TU, UK |
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| Abstract: | The influence of variations in the incident solar spectrum on solar cells is often neglected. This paper investigates the magnitude of this variation and its potential influence on the performance of thin film solar cells in a maritime climate. The investigation centres on the analysis of a large number of measurements carried out in Loughborough, UK, at 10 min intervals over a period of 30 months. The magnitude of the spectral variation is presented both on a daily and a seasonal basis. Of the different thin film materials studied, amorphous silicon is shown to be the most susceptible to changes in the spectral distribution, with the “useful fraction” of the light varying in the range +6% to −9% of the annual average, with the maximum occurring in summer time. |
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| Keywords: | Spectral radiation Spectral variation Spectral effects Thin film solar cells Seasonal variation |
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