Investigating the seasonal performance of amorphous silicon single and multi-junction modules

Infield, D.G.; (2003) Investigating the seasonal performance of amorphous silicon single and multi-junction modules. In: Proceedings of 3rd World Conference on Photovoltaic Energy Conversion, 2003. IEEE, pp. 2078-2081. ISBN 4-9901816-0-3

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Abstract

The seasonal performance fluctuations observed in amorphous silicon solar cells are investigated. The dominant forces driving the increased efficiency in summer are identified, from long-term measurements, to be thermal annealing and spectral variations. A method for correcting for changes in the incident spectrum is applied in order to correct for the seasonal changes. In a second step, the fill factor is investigated in order to establish the magnitude of thermal annealing seen by these devices. The magnitude of each effect is investigated.